Dog Bed Polystyrene

Dog Bed Polystyrene

Causes of pollution and types

INTRODUCTION

Pollution, environmental pollution of the Earth with materials that interfere with human health, quality of life, or the natural functioning of ecosystems (living organisms and their physical environment). Although some environmental pollution is the result of natural causes such as volcanic eruptions over, is caused by human activities.

Reverse Smog surrounds the monument Angel in Mexico City, Mexico, during a thermal investment. significantly increases air pollution when an air mass cold trapped under a warm air mass. Lack of air circulation prevents contamination near the surface of the earth to escape.

There are two broad categories of pollutants or contaminants. Biodegradable pollutants are materials, such as sewage, which rapidly decomposed by natural processes. These pollutants become a problem when it is added to the environment faster than they not decompose (see Sewage Disposal). non-degradable pollutants are materials that either do not break down or decompose slowly in the environment. Once contamination occurs, is difficult or impossible to remove these contaminants from the environment.

degradable compounds such as (DDT), dioxins, polychlorinated biphenyls (PCBs), and radioactive materials can reach unsafe levels of accumulation, and passed the food chain in the body of growing animals. For example, molecules of toxic compounds can accumulate on the surface of aquatic plants, without doing much damage to plants. A small fish that graze on these plants accumulate high concentrations of the toxin. The biggest fish that eat other carnivores smaller fish accumulate even greater, and may be dangerous to life, the concentrations of the compound. This process is called bioaccumulation.

II effects of contamination

Because humans are at the top of the food chain, are particularly vulnerable to the effects of non-degradable pollutants. This was clearly illustrated in the 1950s and 1960s when residents living near Minamata Bay in Japan, has developed problems nervous, tremors and paralysis in a mysterious epidemic. More than 400 people died before authorities discovered a local industry has published of mercury into Minamata Bay. This highly toxic element accumulated in the body of local fish and, possibly, in the bodies of people who eat fish. More recent research has revealed that many chemical pollutants such as DDT and PCBs, mimic sex hormones and interfere with reproductive functions and development of the human body. These substances are known as endocrine disruptors.

The pollution also has a significant impact on resources Natural. Ecosystems such as forests, wetlands, coral reefs, rivers and perform many important environmental services Earth. Improving the quality of water and air, provide habitat for plants and animals and provide food and medicines. Any item or all of these ecosystem functions may be altered or destroyed by pollution. In addition, because of complex relationships between many types of organizations and ecosystems, pollution of the environment can have profound consequences are not immediately obvious or are difficult to predict. By example, scientists can speculate on some possible effects of the depletion of the ozone layer, the protective layer of the atmosphere which protects the Earth against harmful ultraviolet rays of the sun.

Another major effect of pollution is the enormous cost of pollution control and prevention. The global effort to control emissions of carbon dioxide, a gas produced by burning fossil fuels like coal or oil, or other organic materials like wood, is an example. The cost of annual maintenance of national emissions of carbon dioxide to 1990 levels is estimated at 2 percent gross domestic product of developed countries. The costs to reduce pollution in the United States in 1993 amounted to 109 billion dollars: $ 105.4 billion from $ 1.9 billion reduction in the settlement, and $ 1.7 billion in research and development. Twenty-nine percent of the total cost went to air pollution, 36 percent of water pollution, 36 percent of solid waste management.

In addition to its effects on the economy, health, and natural resources, pollution has social consequences. Research has shown that low-income populations and minorities do not receive not the same protection against environmental pollution and high-income communities. toxic waste incinerators, chemical plants and solid waste dumps are often found in low-income communities because of the lack of organized crime, the participation councils of the municipal community decision making.

III types of pollution

Contamination exists in many forms and affects many different aspects of the terrestrial environment. Point source pollution comes from specific, localized and identifiable sources such as sewer fireplaces. diffuse pollution from dispersing or uncontrollable sources such as contaminated runoff from urban areas or emissions automobiles.

The effects of these contaminants can be immediate or delayed. The main effects of pollution occur immediately after contamination occurs, such as the killing of marine plants and animals after an oil spill at sea side effects may be delayed or may persist in the environment in the future, it may go undetected for many years. DDT, a compound which is not degradable, poisons birds seldom immediately, but gradually accumulates in their bodies. Birds with high concentrations of this pesticide has been bombed thin egg not born deformed, or produce offspring. These side effects, published by Rachel Carson in her book 1962 "Silent Spring" threatened the survival for species such as bald eagles and peregrine falcons, and aroused public about hidden effects of chemical non-biodegradable.

Air Pollution

Brown Smog over Phoenix, Arizona, smog is caused by industrial pollution and automobile. Is exacerbated by investments temperature, which cause air pollution to be held in a certain area for long periods. Exposure Prolonged Smog can cause respiratory problems, eye irritation and even death.

human contamination of the atmosphere Earth can take many forms and has been operating since early humans began to use fire for agriculture, heating and cooking. During the Revolution Industrial 18th and 19th centuries, however, air pollution has become a major problem. Already in 1661, writer and founding member of the British Royal Society John Evelyn reported Fumifugium London, in his treatise "... the weary traveler, many miles away, the sooner the smell because the city as repairs. It is entirely pernicious Smoak all his glory, superinducing Crust or Furr soot all these lights. ... "

Air pollution Urban is commonly known as smog. Smog night in London that Evelyn wrote usually a mixture of carbon monoxide from coal smoke and the compounds organics from the incomplete combustion (burning) of fossil fuels such as carbon dioxide and sulfur impurities from fuels. Aging the formation of smog and reacts with oxygen, organic acids and sulfuric acid condense into droplets, which increases the haze. Smog has become a danger to health in the 20th century. In 1948, 19 people died and thousands have been affected by pollution in the small U.S. steel mill town Donora, Pennsylvania. In 1952, some 4,000 Londoners died of its effects.

A second type of contamination, photochemical smog, began reducing the air quality in major cities like Los Angeles in the 1930s. This pollution is caused by burning cars, trucks and aircraft engines produce nitrogen oxides and unburned hydrocarbon fuels release. Sunlight causes the nitrogen oxides and hydrocarbons to combine and transform oxygen into ozone, a chemical agent that attacks rubber, hurt the plants, and irritates the lungs. The hydrocarbons are oxidized materials which condense and form a visible mist, hot.

Finally, most pollutants are washed from the air by rain, snow, fog or mist, but only after having traveled long distances, sometimes across continents. As contaminants accumulate in the atmosphere, sulfur and nitrogen oxides converted into acids that mix with the rain. This acid rain falls into lakes and forests, which can lead to death fish and plants, and all damage ecosystems. Finally, polluted lakes and forests can become lifeless. Regions that are downwind areas highly industrialized countries like Europe and the United States and Canada, are most affected by acid rain. Acid rain can also affect health human and artificial objects, but dissolves slowly historic stone statues and the facades of buildings in London, Athens and Rome.

One major challenges caused by air pollution is global warming, an increase Earth's temperature due to the accumulation in the atmosphere of certain gases like carbon dioxide. With the intensive use of fossil fuels in the 20th century, atmospheric concentrations of carbon dioxide have increased dramatically. Carbon dioxide and other greenhouse gas emissions known as gas, reduce the leakage of heat from the planet without block the sun's radiation. Because of this greenhouse effect, average global temperatures expected to increase 1.4 to 5.8 degrees Celsius (2.5 to 10.4 degrees Fahrenheit) in 2100. While this trend seems to be a small change, the increase would be the Earth warmer than it was in the past 125,000 years, perhaps the climate changes, which affect agricultural production, which alters the distribution of wildlife and the altitude above sea level

Air pollution can also damage the upper region of the atmosphere called the stratosphere. Excessive chlorine-containing compounds such as chlorofluorocarbons (CFCs) (compounds previously used in refrigerators, air conditioners, and manufacture polystyrene) has been depleted ozone in the stratosphere, creating a hole over the Antarctic, which lasts several weeks each year. Consequently, exposure to harmful rays of Sun damaged aquatic and terrestrial wildlife and threatening human health in areas of high latitudes north and south.

B. Water Pollution

The potable water demand is increasing while world population increases. From 1940-1990 freshwater rivers, lakes, reservoirs and other sources quadrupled. Water consumed in the U.S. 1995, 39 percent is used for irrigation, 39 percent is used to generate electricity, and 12 percent is used for other utilities, industry and mines used by 7 percent and the remainder was used for livestock and commercial agriculture.

Sewage, waste and industrial chemicals such as fertilizers and agricultural pesticides are the main causes of water pollution. U.S. Environmental Protection Agency (EPA) indicated that about 37 percent of lakes and estuaries countries, and 36 percent of its rivers are too polluted for uses staples such as fishing or swimming during all or part of the year. In developing countries, more than 95 percent of urban waste water is discharged in rivers and bays, creating a hazard to human health.

pollution of the river in the United Kingdom The pollution of rivers and streams to chemical contaminants has become one of the most critical environmental problems of the 20th century. waterborne pollution of rivers Sign chemical and streams comes from two main sources: point sources of pollution and diffuse pollution. point sources pollution-related products chemicals that can be clearly distinguished, such as factories, refineries or drainage pipes. diffuse pollution caused by pollution sources that can not not be identified with precision, such as runoff from agricultural or mining or seepage from septic tanks or drain fields sewer. It is estimated that each year 10 million people worldwide die from drinking contaminated water.

runoff water, a source of diffuse pollution, leads to chemical fertilizers like phosphates and nitrates from farm fields and yards into lakes, streams and rivers. These combined with phosphates and nitrates from sewage to accelerate the growth of algae, a type of plantlike body. The water can become choked with the decline of algae, which reduces the oxygen supply. This process, called Eutrophication can kill fish and other aquatic organisms. agricultural runoff may be causing the growth of a toxic form of Pfiesteria piscicida called algae, which was responsible for killing many fish in the waters of Delaware Bay in the Gulf of Mexico at the end of 1990. Runoff also carries toxic pesticides and urban and industrial waste into lakes and streams.

The erosion, erosion of topsoil by wind and rain, also contributes to water pollution. Soil and silt (fine sediment) washed from the slopes computing; plowed fields or construction sites, can clog waterways and kill aquatic vegetation. Even small amounts of silt can eliminate desirable fish species. For example, when you log removes the protective cover on slopes, rain can wash the soil and sediments during water cover the gravel beds that trout or use for spawning salmon.

Sea fishing with the support of marine ecosystems are an essential source of proteins in particular for developing countries. However, pollution in the coastal bays, estuaries, wetlands and threatens fish stocks already depleted by overfishing. In 1989, 260,000 barrels of oil spilled by the Exxon Valdez in Alaska Prince William Sound, a fishing zone virgin and rich. In 1999, there were 8,539 reported spills and around the waters of the United States, involving 4.4 billion liters (1.2 million gallons) oil.

Contamination of soil C

Fight against parasites or pollution? fight against pests has become a difficult issue for farmers because of their potential impact on the environment. Although the insecticide sprayed in this area a generation potato removed CPB can also contaminate food and water sources.

Soil is a mixture of minerals, plants, animals and materials formed during a long process that can take thousands of years. It is necessary for plant growth and is essential for all production agriculture. Soil contamination is an accumulation of toxic chemicals, salts, pathogens (disease-causing organisms) or radioactive material that can affect plant and animal life.

Unhealthy soil management methods of soil quality deteriorated severely, caused pollution and soil erosion increased. Treat the soil with chemical fertilizers, pesticides and fungicides interferes with natural processes that occur in the soil and destroys useful organisms microorganisms such as bacteria, fungi and others. For example, strawberry farmers in California bromide soil fumigation Methyl destroy organisms that may damage strawberry plants young. This process kills microorganisms indiscriminately even beneficial and leaves the soil sterile and depends on the fertilizer to support plant growth. This results in increased use of fertilizers and polluted runoff in heavy lakes and streams.

irrigation areas of misconduct with poorly drained soils can result in salt deposits that inhibit growth plants and can result in poor harvests. In 2000 BC the ancient Sumerian city south of the valley of the Tigris and Euphrates in Mesopotamia depend on agriculture to flourish. In 1500 BC, these cities have collapsed in large part because poor harvest due to high salinity soil. The problem of soil contamination are also present in the valley of the Indus in Pakistan, the Nile Valley in Egypt and in the valley Imperial, California.

D Solid Waste

The components of municipal solid waste A person living in an industrialized product much material from a variety of solid waste, often a mixture of potentially reusable or recyclable (as paper and garden waste) and largely non-recyclable (including food waste and many types of plastic). Municipal solid waste (waste collected in homes and businesses) produced in the United States in 2000, about two-fifths of paper, metal and yard waste were recycled, and about one quarter of glass is recycled.

Solid wastes are not undesirable solid materials such as garbage, paper, plastics and other synthetic materials, metals and wood. Billions of tons of solid waste are dumped each year takes place. Only the U.S. produces approximately 200 million tons of municipal solid waste per year (see Solid Waste). A typical American generates an average of 2 kg (4 lb) of waste solid every day. The cities in economically developed countries produce more solid waste per capita than developing countries. In addition, waste developed countries typically contains a high percentage of synthetic materials take longer to break down biodegradable waste mainly from developing countries.

A resident overflowing landfill half the city can produce one ton of waste per year, a volume that rapidly overflows local landfills. Cities running out of landfill space often use incineration waste or transportation to other areas, although up to 90 percent of the material could be recycled.

Areas where wastes are buried, called landfills, disposal methods are cheaper and more common for solid waste worldwide. But without landfills quickly become overfilled and may contaminate air, soil and water. The burning or incineration waste reduces the volume of solid waste, but produces dense ash waste (some of which are in the air) which often contain concentrations dangerous hazardous materials like heavy metals and toxic compounds. Composting, using natural biological processes to accelerate the decomposition organic waste is an effective strategy to deal with organic waste and produces a material that can be used as a natural fertilizer. Recycling extraction and reuse of waste has become an important part of strategies of municipal solid waste in developed countries. By EPA, more than a quarter of municipal solid waste produced in the United States is now recycled or composted. Recycling also plays a role important in the informal solid waste management in many countries in Asia, like India, where organized streets and landfill waste pickers comb items such as plastics, that use or sell.

Expanding recycling programs worldwide can help reduce pollution from waste solid, but the key to solving the serious problems of solid waste is in reducing the amount of waste generated. Prevention waste, or source reduction, such as changing the way products are designed and manufactured to make them easier to reuse, reduce the high costs associated with pollution of the environment.

E Hazardous Waste

Residents waste toxic Love Canal area of Love Canal in Niagara Falls were forced to evacuate when hazardous waste seeping from a waste disposal site Ex threatening their health and housing at the end of 1970. One of the most egregious instances of leakage of toxic waste, the crisis has received attention locally and nationally. Research led by the public outrage has revealed that many waste sites like Love Canal elimination at national level in New York had only hundreds. Several states have adopted stricter regulations on industrial waste and billions of dollars allocated for cleaning areas contaminated.

Hazardous wastes are solid, liquid, gas or waste that can be fatal or harmful to humans or the environment and tend to be persistent or non-degradable in nature. These wastes are toxic and flammable chemicals or radioactive substances, including industrial waste from chemical plants and nuclear reactors agricultural residues such as pesticides and fertilizers, medical waste, and waste household hazardous and toxic paints and solvents.

Out of 400 million metric tons of hazardous waste produced each year. Only the United States produce about 250 million tonnes, 70 percent of the chemical industry. The use, storage, transportation and disposal of these substances pose serious risks to health and the environment. Even brief exposure to some of these materials can cause cancer, birth defects, nervous system disorders and death. Large-scale releases of hazardous materials can cause thousands of deaths and polluters of the air water and soil for many years. The worst nuclear reactor accident at Chernobyl occurred near the Ukraine in 1986 (see Chernobyl). In The accident killed at least 31 people, forced the evacuation and resettlement of over 200,000 more, and sent a plume of radioactive material in the atmosphere contaminated areas as far away as Norway and the United Kingdom.

Until the pollution of Minamata Bay was discovered in Japan in 1960 and 1970, most hazardous wastes have been dumped legally in the landfills solid, buried or thrown into lakes, rivers and oceans. Legal rules and restrict how these materials can be used or eliminated, but the laws are cumbersome and often contested by the industry. It is not uncommon for companies in industrial countries developed to pay poor countries to accept shipments of hazardous and solid waste, a practice known as trade waste. In addition, negligent discharge cleaning the mid-20th century, costing billions of dollars and is growing very slowly, if at all. The United States an estimated 217,000 hazardous waste sites that require immediate action. Clean up could take more than 30 years and cost $ 187 billion.

Hazardous waste particular interest are the radioactive waste from nuclear and arms industries. To date there is no safe method for permanent disposal of fuel elements for nuclear reactors age. Most are kept in storage facilities on the sites of origin of the reactor in which they were generated. With the end of the Cold War, nuclear warheads who are out of service, or are no longer in use, also pose problems for storage and disposal.

Noise F

Intensities sound intensities of sound is measured in decibels (dB). For example, the intensity on the threshold of hearing is 0 dB, the intensity of the rumor is generally about 10 dB, and the intensity of rustling leaves nearly 20 dB. sound intensities are arranged in a logarithmic scale, which means an increase of 10 dB corresponds to an increase in intensity by a factor of 10. Therefore, rustling leaves are about 10 times louder than a whisper.

unwanted sound, or noise, like aircraft, traffic, or machinery industry, is considered a form contamination. Noise pollution is worse in densely populated areas. It can cause hearing loss, stress, hypertension pressure, sleep loss, distraction and lost productivity.

The sounds are produced by objects that vibrate at a pace that the ear can detect. This rate is called the frequency and is measured in hertz, or vibrations per second. Most humans can hear sounds between 20 and 20,000 Hz, while Dogs can hear sounds up to 50,000 Hz acute While most high-frequency sounds tend to be more dangerous and more annoying to hear low frequency sounds that the noise pollution damage is related to the intensity of sound, or the amount of energy it has. It is measured in decibels, the noise intensity can vary from zero, the quietest sound the human ear can detect more than 160 decibels. Conversation occurs at about 40 decibels, a subway train is about 80 decibels, and a rock concert is from 80 to 100 decibels. Intensity a plane taking off is near 110 decibels. The threshold of pain, tissue damage and potential hearing loss in humans is 120 decibels. Long duration, high intensity sounds are the most damaging to hearing and produce more stress in humans.

Solutions to noise pollution include adding insulation and soundproof doors, walls and ceilings protective clothing ears, especially in industrial areas of work, planting vegetation to absorb and filter out noise, zoning and urban areas to maintain the separation between residential areas and areas of excessive noise.

About the Author

My name is MIAN AFAQ TARIQ. I am student of 2nd year in MTB Higher Secondry School. I am living in Sadiqabad(PAKISTAN). My contect numbers are 03342527785 and 03023357300.

No tags for this post.

Related posts

• No related posts.