(Survival Manual/2. Social Issues/ Death by 1000 cuts/ Modern Air & Water)
Modern Air & Water topics:
1. Air pollution (it hasn’t gone away) .
2. Water, with chlorine, fluorine, pharmaceuticals and more.
3. Berkey water purification system, Royal model
4. Mercury in food & vaccines
5. Synopsis: Pollution causes 40% of worldwide deaths
1. Air pollution
[Above: US Air Quality maps present a visual picture of air quality for more than 3,000 US counties. This map shows United States air quality by county.]
[Above: The global map of air pollution compares closely with this map of Gross Domestic Product Density.]
[Above: When the dominant airflow came from south and east Asia, the scientists saw the largest increases in ozone measurements. When airflow patterns were not directly from Asia, ozone still increased but at a lower rate, indicating the possibility that emissions from other places could be contributing to the ozone increases above North America. The study used springtime ozone measurements because previous studies have shown that air transport from Asia to North America is strongest in spring, making it easier to discern possible effects of distant pollution on the North American ozone trends.
We’re All In This Together: I think the take home message here isn’t so much that Asian pollution is affecting the US, but rather that the Earth is a closed system (well, not literally, but when it comes to pollution, it mostly is) and what happens in one place has impact on other places.
A lot of that pollution coming from Asia was created because goods bought by people in the US were manufactured there. A lot of pollution from the US affects other countries (f.ex., coal plant emissions going up to Canada). It’s not about pointing fingers, but about cleaning up the whole system. We can’t expect that we can simply ship off polluting industries elsewhere forever; developing countries won’t accept that indefinitely, and once they get out of poverty they’ll also be interested in clean air/water/soil, but also, political borders don’t matter to the atmosphere and the oceans.]
A. Smog – Who does it hurt?
What You Need to Know About Ozone and Your Health
In fact, breathing smoggy air can be hazardous because smog contains ozone, a pollutant that can harm our health when there are elevated levels in the air we breathe. This publication will tell you what kinds of health effects ozone can cause, when you should be concerned, and what you can do to avoid dangerous exposures.
On a hot, smoggy summer day, have you ever wondered:
Is the air safe to breathe? Should I be concerned about going outside?
What is ozone?
Ozone is a colorless gas composed of three atoms of oxygen. Ozone occurs both in the Earth’s upper atmosphere and at ground level. Ozone can be good or bad, depending on where it is found:
• Good Ozone. Ozone occurs naturally in the Earth’s upper atmosphere-10 to 30 miles above the Earth’s surface-where it forms a protective layer that shields us from the sun’s harmful ultraviolet rays. This “good” ozone is gradually being destroyed by manmade chemicals. An area where ozone has been most significantly depleted-for example, over the North or South pole-is sometimes called a “hole in the ozone.”
• Bad Ozone. In the Earth’s lower atmosphere, near ground level, ozone is formed when pollutants emitted by cars, power plants, industrial boilers, refineries, chemical plants, and other sources react chemically in the presence of sunlight.
Should you be concerned about exposure to ground-level ozone?
That depends on who you are and how much ozone is in the air. Most people only have to worry about ozone exposure when ground-level concentrations reach high levels. In many U.S. communities, this can happen frequently during the summer months. In general, as ground-level ozone concentrations increase, more and more people experience health effects, the effects become more serious, and more people are admitted to the hospital everyone should be concerned about ozone exposure. Children and adults of all ages who are active outdoors are at risk from ozone exposure.
Scientists have found that about one out of every three people in the United States is at a higher risk of experiencing ozone-related health effects. If you are a member of a “sensitive group,” you should pay special attention to ozone levels in your area. z
This publication describes several tools that the U.S. Environmental Protection Agency (EPA), in partnership with State and local agencies, has developed to inform the public about local ozone levels. These tools provide the information you need to decide whether ozone levels on any particular day may be harmful to you. When ozone concentrations reach unhealthy levels, you can take simple precautions to protect your health.
[Above: This photo shows a healthy lung air way (left) and an inflamed lung air way (right). Ozone can inflame the lung’s lining, and repeated episodes of inflammation may cause permanent changes in the lung.]
How might ozone affect your health?
Scientists have been studying the effects of ozone on human health for many years. So far, they have found that ozone can cause several types of short-term health effects in the lungs:
• Ozone can irritate the respiratory system. When this happens, you might start coughing, feel an irritation in your throat, and/or experience an uncomfortable sensation in your chest. These symptoms can last for a few hours after ozone exposure and may even become painful.
• Ozone can reduce lung function. When scientists refer to “lung function,” they mean the volume of air that you draw in when you take a full breath and the speed at which you are able to blow it out. Ozone can make it more difficult for you to breathe as deeply and vigorously as you normally would. When this happens, you may notice that breathing starts to feel uncomfortable. If you are exercising or working outdoors, you may notice that you are taking more rapid and shallow breaths than normal. Reduced lung function can be a particular problem for outdoor workers, competitive athletes, and other people who exercise outdoors.
• Ozone can aggravate asthma. When ozone levels are high, more asthmatics have asthma attacks that require a doctor’s attention or the use of additional medication. One reason this happens is that ozone makes people more sensitive to allergens, which are the most common triggers for asthma attacks. (Allergens come from dust mites, cockroaches, pets, fungus, and pollen.) Also, asthmatics are more severely affected by the reduced lung function and irritation that ozone causes in the respiratory system.
• Ozone can inflame and damage the lining of the lung. Some scientists have compared ozone’s effect on the lining of the lung to the effect of sunburn on the skin. Ozone damages the cells that line the air spaces in the lung. Within a few days, the damaged cells are replaced and the old cells are shed-much in the way that skin peels after a sunburn. If this kind of damage occurs repeatedly, the lung may change permanently in a way that could cause long-term health effects and a lower quality of life.
• Scientists suspect that ozone may have other effects on people’s health. Ozone may aggravate chronic lung diseases, such as emphysema and bronchitis.
• Also, studies in animals suggest that ozone may reduce the immune system’s ability to fight off bacterial infections in the respiratory system.
Most of these effects are considered to be short-term effects because they eventually cease once the individual is no longer exposed to elevated levels of ozone. However, scientists are concerned that repeated short-term damage from ozone exposure may permanently injure the lung. For example, repeated ozone impacts on the developing lungs of children may lead to reduced lung function as adults. Also, ozone exposure may speed up the decline in lung function that occurs as a natural result of the aging process. Research is underway to help us better understand the possible long-term effects of ozone exposure.
Who is most at risk from ozone?
Four groups of people, described below, are particularly sensitive to ozone. These groups become sensitive to ozone when they are active outdoors, because physical activity (such as jogging or outdoor work) causes people to breathe faster and more deeply. During activity, ozone penetrates deeper into the parts of the lungs that are more vulnerable to injury. Sensitive groups include:
1) Children. Active children are the group at highest risk from ozone exposure. Such children often spend a large part of their summer vacation outdoors, engaged in vigorous activities either in their neighborhood or at summer camp. Children are also more likely to have asthma or other respiratory illnesses. Asthma is the most common chronic disease for children and may be aggravated by ozone exposure.
2) Adults who are active outdoors. Healthy adults of all ages who exercise or work vigorously outdoors are considered a “sensitive group” because they have a higher level of exposure to ozone than people who are less active outdoors.
3) People with respiratory diseases, such as asthma. There is no evidence that ozone causes asthma or other chronic respiratory disease, but these diseases do make the lungs more vulnerable to the effects of ozone. Thus, individuals with these conditions will generally experience the effects of ozone earlier and at lower levels than less sensitive individuals.
4) People with unusual susceptibility to ozone. Scientists don’t yet know why, but some healthy people are simply more sensitive to ozone than others. These individuals may experience more health effects from ozone exposure than the average person.
Scientists have studied other groups to find out whether they are at increased risk from ozone. So far there is little evidence to suggest that either the elderly or people with heart disease have heightened sensitivity to ozone. However, like other adults, elderly people will be at higher risk from ozone exposure if they suffer from respiratory disease, are active outdoors, or are unusually susceptible to ozone as described above.
How can you tell if you’re being affected by ozone?
Often, people exposed to ozone experience recognizable symptoms, including coughing, irritation in the airways, rapid or shallow breathing, and discomfort when breathing or general discomfort in the chest. People with asthma may experience asthma attacks. When ozone levels are higher than normal, any of these symptoms may indicate that you should minimize the time spent outdoors, or at least reduce your activity level, to protect your health until ozone levels decline.
Ozone damage also can occur without any noticeable signs. Sometimes there are no symptoms, or sometimes they are too subtle to notice. People who live in areas where ozone levels are frequently high may find that their initial symptoms of ozone exposure go away over time-particularly when exposure to high ozone levels continues for several days. This does not mean that they have developed resistance to ozone. In fact, scientists have found that ozone continues to cause lung damage even when the symptoms have disappeared. The best way to protect your health is to find out when ozone levels are elevated in your area and take simple precautions to minimize exposure even when you don’t feel obvious symptoms.
How can I find out about ozone levels in my area?
EPA and State and local air agencies have developed a number of tools to provide people with information on local ozone levels, their potential health effects, and suggested activities for reducing ozone exposure.
Air Quality Index. EPA has developed the Air Quality Index, or AQI, for reporting the levels of ozone and other common air pollutants. The index makes it easier for the public to understand the health significance of air pollution levels. Air quality is measured by a nationwide monitoring system that records concentrations of ozone and several other air pollutants at more than a thousand locations across the country. EPA “translates” the pollutant concentrations to the standard AQI index, which ranges from 0 to 500. The higher the AQI value for a pollutant, the greater the danger. An AQI value of 100 usually corresponds to the national ambient air quality standard (NAAQS) for the pollutant. These standards are established by EPA under the Clean Air Act to protect public health and the environment.
The AQI scale has been divided into distinct categories, each corresponding to a different level of health concern. In the table below, the AQI ranges are shown in the middle column and the associated air quality descriptors are shown in the right column. The left column shows the ozone concentrations, measured in parts per million (ppm), that correspond to each category.
Though the AQI scale extends to 500, levels above 300 rarely occur in the United States. This publication and most other references to the AQI do not list health effects and cautionary statements for levels above 300. If ozone levels above 300 should ever occur, everyone should avoid physical exertion outdoors.
When pollutant levels are high, states are required to report the AQI in large metropolitan areas (populations over 350,000) of the United States. You may see the AQI for ozone reported in your newspaper, or your local television or radio weathercasters may use the AQI to provide information about ozone in your area. Here’s the type of report you might hear:
AQI Colors. To make it easier for the public to quickly understand the air quality in their communities, EPA has assigned a specific color to each AQI category. You will see these colors when the AQI is reported in a color format-such as in a color-print newspaper, on television broadcasts, or on your State or local air pollution agency’s web site. This color scheme can help you quickly determine whether air pollutants are reaching unhealthy levels in your area. For example, the color orange means that conditions are “unhealthy for sensitive groups,” the color red means that conditions are “unhealthy” for everyone, and so on.
This map shows ozone levels in the south central United States on May 15, 2011. Ozone maps are updated several times daily to show how ozone levels change throughout the day.
Ozone Maps. In many areas of the country, measurements of ozone concentrations are converted into color contours of the AQI categories (green, yellow, orange, red, and purple, shown above) and displayed on a map (see example below) to show ozone levels in the local area. The map is updated throughout the day and shows how ozone builds during hot summer days. In some areas, ozone maps are used to show a forecast of ozone levels for the next day.
What can I do to avoid unhealthy exposure to ozone?
You can take a number of steps. The chart below, “Health Effects and Protective Actions for Specific Ozone Ranges,” tells you what types of health effects may occur at specific ozone concentrations and what you can do to avoid them. If you are a parent, keep in mind that your children are likely to be at higher risk, particularly if they are active outdoors. You may therefore want to pay special attention to the guidance.
In general, when ozone levels are elevated, your chances of being affected by ozone increase the longer you are active outdoors and the more strenuous the activity you engage in. Scientific studies show that:
• At ozone levels above 0.12 ppm, heavy outdoor exertion for short periods of time (1 to 3 hours) can increase your risk of experiencing respiratory symptoms and reduced lung function.
• At ozone levels between 0.08 and 0.12 ppm, even moderate outdoor exertion for longer periods of time (4 to 8 hours) can increase your risk of experiencing ozone-related effects.
EPA recommends limiting outdoor activities as ozone levels rise to unhealthy levels. You can limit the amount of time you are active outdoors or your activity level. For example, if you’re involved in an activity that requires heavy exertion, such as running or heavy manual labor, you can reduce the time you spend on this activity or substitute another activity that requires less exertion (e.g., go for a walk rather than a jog). In addition, you can plan outdoor activities when ozone levels are lower, usually in the early
Health Effects and Protective Actions for Specific Ozone Ranges
1. Good: What are the possible health effects? No health effects are expected.
2. Moderate: What are the possible health effects? Unusually sensitive individuals may experience respiratory effects from prolonged exposure to ozone during outdoor exertion.
What can I do to protect my health? When ozone levels are in the “moderate” range, consider limiting prolonged outdoor exertion if you are unusually sensitive to ozone.
3. Unhealthy for Sensitive Groups: What are the possible health effects? If you are a member of a sensitive group,(1) you may experience respiratory symptoms (such as coughing or pain when taking a deep breath) and reduced lung function, which can cause some breathing discomfort.
What can I do to protect my health? If you are a member of a sensitive group, limit prolonged outdoor exertion. In general, you can protect your health by reducing how long or how strenuously you exert yourself outdoors and by planning outdoor activities when ozone levels are lower (usually in the early morning or evening). You can check with your State air agency to find out about current or predicted ozone levels in your location.
4. Unhealthy: What are the possible health effects? If you are a member of a sensitive group, you have a higher chance of experiencing respiratory symptoms (such as aggravated cough or pain when taking a deep breath), and reduced lung function, which can cause some breathing difficulty. At this level, anyone could experience respiratory effects.
What can I do to protect my health? If you are a member of a sensitive group, avoid prolonged outdoor exertion. Everyone else-especially children-should limit prolonged outdoor exertion. Plan outdoor activities when ozone levels are lower (usually in the early morning or evening). You can check with your State air agency to find out about current or predicted ozone levels in your location.
5. Very Unhealthy: What are the possible health effects? Members of sensitive groups will likely experience increasingly severe respiratory symptoms and impaired breathing. Many healthy people in the general population engaged in moderate exertion will experience some kind of effect. According to EPA estimates, approximately:
– Half will experience moderately reduced lung function.
– One-fifth will experience severely reduced lung function.
– 10 to 15 percent will experience moderate to severe respiratory symptoms (such as aggravated cough and pain when taking a deep breath).
People with asthma or other respiratory conditions will be more severely affected, leading some to increase medication usage and seek medical attention at an emergency room or clinic.
What can I do to protect my health? If you are a member of a sensitive group, avoid outdoor activity altogether. Everyone else especially children should limit outdoor exertion and avoid heavy exertion altogether. This information on ozone levels is available on the Internet at http://www.epa.gov/airnow.
What does exertion have to do with ozone-related health effects?
Exercise and outdoor activities can play an important role in maintaining good health. Physical exertion helps build up strength in the heart and lungs. But exerting yourself outdoors can actually increase your chances of experiencing health effects when ozone concentrations are at unhealthy levels. Why is this true? Think of it this way: Exertion generally causes you to breathe harder and faster. When this happens, more ozone is taken into your lungs, and ozone reaches tissues that are susceptible to injury. Research has shown that respiratory effects are observed at lower ozone concentrations if either the level or duration of exertion is increased. This is why EPA recommends decreasing the level or duration of exertion to avoid ozone health effects.
Examples of typical daily activities that involve moderate exertion include climbing stairs, light jogging, easy cycling, playing tennis or baseball, and stacking firewood. Outdoor occupational activities such as simple construction work, pushing a wheelbarrow with a load, using a sledgehammer, or digging in your garden, would also involve moderate exertion. Activities that involve heavy exertion include vigorous running or cycling, playing basketball or soccer, chopping wood, and heavy manual labor. Because fitness levels vary widely among individuals, what is moderate exertion for one person may be heavy exertion for another. No matter how fit you are, cutting back on the level or duration of exertion when ozone levels are high will help protect you from ozone’s harmful effects.
What can you do to reduce ozone levels?
Ground-level ozone is created when certain pollutants, known as “ozone precursors,” react in heat and sunlight to form ozone. Cars and other vehicles are the largest source of ozone precursors. Other important sources include industrial facilities, power plants, gasoline-powered mowers, and evaporation of cleaners, paints, and other chemicals.
We can all help reduce ozone levels by taking the following steps:
• Drive less. For example, instead of using a car, you may want to walk, use mass transit, or ride a bike.
• Make sure your car is well-tuned. Take care not to spill gasoline when you fill the tank of your car or lawn or recreation equipment.
• Make sure that you tightly seal the lids of chemical products-such as solvents, garden chemicals, or household cleaners-to keep evaporation to a minimum.
B. Air and Water Pollution an Increasing Threat to Human Life
Did you know: about 2 million premature deaths are caused each year due to air pollution in cities across the world? And over a billion people in the world do not have access to clean water?
Despite attempts by the United States and other countries to regulate air and water quality, pollution continues to present a major global problem. If not fully addressed over the next few decades, air and water pollution will continue to worsen the environment and endanger other living organisms.
It will also harm our health and ultimately threaten the existence of the human species.
Attempts to Regulate Air and Water Quality
The United States began regulating air and water quality several decades ago. While Congress began passing air pollution laws as early as 1955, The Clean Air Act of 1970 was the first legislation to establish comprehensive federal and state regulations that limited emissions from both stationary and mobile sources.
The Clean Water Act, enacted two years later, called for the restoration and maintenance of the chemical, physical, and biological integrity of the nation’s waters.
The Clean Water Act and the Clean Air Act have greatly improved environmental quality in the U.S.
These acts have greatly improved environmental quality in the U.S. For example, the six most common air pollutants have decreased by more than 50 percent, according to the U.S. Environmental Protection Agency, while air toxics from large industrial sources, such as chemical plants, petroleum refineries, and paper mills have been reduced by nearly 70 percent. New cars are more than 90 percent cleaner than they were in the 1970s, and production of most ozone-depleting chemicals has ceased. (Ceased in the USA, remember we transferred our most polluting industries-steel making to China, along with a lot of other manufacturing. lfp)
The rate at which wetlands are lost has declined some 90 percent since the early 1970s, and the amount of oil spilled annually into our waters has fallen to one-tenth of the level that once prevailed.
Worldwide Population Growth is Outstripping many of these gains
While substantial progress has been made, our worldwide population continues to grow, putting added pressures on the planet. The earth’s population has doubled from 3.3 billion to 6.7 billion in the last 40 years, and is expected to reach 9 million by the year 2040.
In the U.S. alone, energy consumption has increased by 50 percent since the 1970s, and vehicle use has increased by almost 200 percent, contributing to ever higher levels of pollutants in our air and water.
Air Pollution Causes Global Health Risk
Studies have found that the risk of lung cancer and heart disease increases along with the level of air pollution. According to one study published by the Journal of the American Medical Association, the risk of lung cancer death went up by 8 percent for every 10 micrograms of fine particles in a cubic meter of air.
Air pollution is usually concentrated in densely populated metropolitan areas, especially in developing countries where environmental regulations are lax or non-existent. For example, in China, which has all 10 of the 10 most polluted cities of the world, air pollution is believed to cause 1.75 million premature deaths per year.
[Photos above: Beijing, China, air on a day after rain (left) and a sunny but otherwise smoky day (right)]
Even in cities across the U.S., air pollution is taking a toll on human life. For example, a recent study of the health impacts and associated costs of air pollution in the Los Angeles Basin and the San Joaquin Valley found that if Federal air standards were being followed the savings would be about 3,800 fewer premature deaths among those age 30 and older; 1.2 million fewer days of school absences; 2 million fewer days of respiratory problems in children; 467,000 fewer lost days of work and 2,700 fewer hospital admissions in the state of California alone.
C. The Major Sources of Air and Water Pollution
So what exactly causes our air and water to become contaminated? There are many sources of air and water pollution, both direct and indirect. These include emissions from power plants and factories; sewage and storm water runoff; oil pollution and motor vehicle exhaust; pesticides, fertilizers and chemical solvents; litter that makes its way into our waterways; and military weaponry.
Power Plant and Factory pollution release tons of toxic chemicals each year
Every year U.S. factories release over 3 million tons of toxic chemicals into the land, air and water. This hazardous waste causes us to lose over 15 million acres of land annually, and leads to respiratory complications and other health problems. It also makes our rivers and lakes too polluted for us to swim in and drink.
Power plants, especially coal-fired plants, are a major source of air pollution. Despite the fact that coal is responsible for nearly 40 percent of carbon dioxide emissions in the U.S., coal-fired plants continue to be used for about half of all electricity in the U.S, according to the Sierra Club’s Dirty Truth report.
[Photo at left: The Amos coal powered electric plant at Winfield, WV]
Other industries, too, including paper mills, chemical companies, mining companies and manufacturing firms emit acidifying gases such as sulphur oxide and dioxide, carbon monoxide and dioxide, nitrogen oxide into the air. During precipitation, rainwater dissolves these gases, lowering the pH level and becoming acid rain.
D. Other forms of air and surface pollution
• Acid Rain is reducing fish populations and decreasing biodiversity
• Acid rain falls into lakes and streams, reducing fish population and harming plants and other organisms. A survey by the U.S. Environmental Protection Agency (EPA) found that acid rain caused acidity in 75 percent of the acidic lakes and about 50 percent of the acidic streams, reducing fish populations and decreasing aquatic biodiversity.
• Acid rain also damages trees and forests by harming their leaves, limiting the nutrients available to them, and exposing them to toxic substances slowly released from the soil. In addition, acid rain takes a toll on human health. Many scientific studies have identified a connection between acid rain and increased illness and premature death from heart and lung disorders, such as asthma and bronchitis, according to the EPA.
• Sewage and storm water runoff are also major pollutants. Every year, 1.2 trillion gallons of untreated sewage, stormwater, and industrial waste are discharged into U.S. waters.
• Sewage pollution costs Americans billions of dollars every year in medical treatment, lost productivity and property damage, according to a report by the Natural Resources Defense Council (NRDC).
• Stormwater runoff, caused when precipitation from rain or snowmelt flows over impervious surfaces such as driveways, sidewalks, and streets, also presents a major problem. Along the way, stormwater can pick up oil from automobiles, pesticides, fertilizers from gardens, micro-organisms from animal waste, and other toxic substances, depositing them into our waterways, where they damage plants, fish, animals and people.
• Stormwater runoff is among the top sources of water contamination in the country today, according to the NRDC.
Oil Pollution and Motor Vehicle Exhaust are major sources of air and water pollution.
• Another major pollutant is oil, which makes its way into the water from automobiles, ships, industrial sites and tanker spills.
• Each year, more than 700 million gallons of oil end up in our oceans worldwide, according to the National Aeronautics and Space Administration. Roughly half results from used engine oil and oily road runoff, while about a fifth comes from bilge cleaning and other ship operations.
• Other sources include air pollution from automobiles and industry, as well as oil spills due to major tanker accidents. Not only do motor vehicles leak oil; they produce a variety of emissions that can have negative effects on humans, plants, animals and the environment. Vehicle exhaust contributes up to 60 percent of carbon monoxide emissions in the U.S., and up to 95 percent in larger cities. Hydrocarbons, which are made up of unburned or partially burned fuel, are a major contributor to urban smog, and can cause liver damage and even cancer. Other motor vehicle pollutants include carbon monoxide, nitrogen oxides, particulates and sulfur oxide.
Agricultural Pesticides, Fertilizers and Chemical Solvents contaminate land and drinking water supplies
Pesticides, fertilizers and animal waste generated by the agricultural industry are another source of pollution. Americans use over 1 billion pounds of pesticides each year to control weeds, insects and other pests.
Pesticide contaminates land and water when it escapes from production sites and storage tanks, when it runs off from fields, when it is discarded, and when it is sprayed aerially. In a study by the U.S. Geological Service, one or more pesticides were detected in 90 percent of streams and 50 percent of wells that were sampled.
Pesticides have been shown to harm birds, fish and other aquatic life, and even amphibians. The use of pesticides also decreases the biodiversity of soil, reducing its quality over time.
In addition to pesticides and fertilizers, household products such as paints, paint strippers, and other solvents; wood preservatives; aerosol sprays; cleansers and disinfectants; insect repellents and air fresheners; stored fuels and automotive products; hobby supplies; and dry-cleaned clothing emit volatile organic compounds (VOCs), which may cause cancer in humans, depending on the amount and length of exposure.
Litter especially plastics pollute our oceans and rivers
Every year, 15 billion pounds of plastic are produced in the U.S., while only 1 billion pounds are recycled, according to the non-profit Greenpeace. Some of this plastic ends up getting swept into the ocean, where it accumulates with other trash to form huge, swirling vortexes. For example, one huge vortex off the coast of Hawaii has now reached the size of Texas [See Post: Modern Air & Water,Part 2 of 3]. Animals often mistake the plastic for food, and die after ingesting the toxic chemicals contained within it.
Because plastic decomposes only very slowly, it remains in the ecosystem for decades. As the amount of trash increases in our oceans, it is creating a crisis of epic proportions.
An estimated 100,000 marine mammals and turtles are killed by plastic litter every year around the world. Large marine animals such as seals and dolphins sometimes starve to death when trapped by plastic litter.
Chemical Weapons Production, Testing and Use leach into the soil and waterways
Chemical weapons also pose serious threats to the environment. Despite numerous efforts to reduce or eliminate chemical weapons, many nations continue to research and stockpile them.
To date, about 70 different chemicals have been used or stockpiled as chemical warfare agents by several countries ranging from the U.S. to Russia to Iran.
In addition, nuclear weapons release enormous amounts of radioactive materials when they are exploded during testing, while the production of nuclear weapons generates large quantities of waste material and contaminates surrounding areas.
Millions of gallons of Radioactive Waste has made its way into soil and water
In the U.S. alone, the U.S. Department of Energy (DOE) lists more than 4,500 contaminated sites.
Nuclear weapons production and energy research have generated “millions of gallons of radioactive waste, thousands of tons of spent nuclear fuel and special nuclear material, along with huge quantities of contaminated soil and water,” according to a five-year DOE environmental management plan.
Pollution from weapons programs has been associated with millions of deaths, most of them cancer-related. For example, a 2003 report by the European Committee of Radiation Risk, an international body made up of 30 independent scientists, concluded that pollution from nuclear energy and of exposures to global atmospheric weapons fallout accounted for 65 million deaths through the year 1989.
Continued in Survival Manual/ Social Issues/Modern Air & Water, Part 2 of 3.
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