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Copy of Major Air Pollutants
Transcript of Copy of Major Air Pollutants
Pollution Air pollution is a real public health and environmental problem that can lead to- GLOBAL WARMING ACID
LAYER POLLUTANT'S SOURCES AND EFFECTS OZONE. Formed when nitrogen oxides and volatile organic compounds mix in sunlight. That is why ozone is mostly found during summer. It can lead to more frequent asthma attacks in people who have asthma and can cause sore throats, coughs, and breathing difficulty. It may even lead to premature death. Ozone can also hurt plants and crops. PARTICULATE MATTER Solid or liquid matter that is suspended in the air. To remain in the air, particles usually must be less than 0.1-mm wide and can be as small as 0.00005 mm. Particulate matter can be divided into two types—coarse particles and fine particles. Particulate matter that is small enough can enter the lungs and cause health problems. Some of these problems include more frequent asthma attacks, respiratory problems, and premature death. COARSE PARTICLES FINE PARTICLES CARBON MONOXIDE It comes from the burning of fossil fuels, mostly in cars. It cannot be seen or smelled. Emissions are higher when engines are not tuned properly, and when fuel is not completely burned. A reddish-brown gas that comes from the burning of fossil fuels mostly from power plants and cars. Nitrogen dioxide is formed in two ways—when nitrogen in the fuel is burned, or when nitrogen in the air reacts with oxygen at very high temperatures. High level exposure can give people coughs and can make them feel short of breath. People who are exposed to nitrogen dioxide for a long time have a higher chance of getting respiratory infections.
It can also harm plants and animals when it reacts in the atmosphere to form acid rain. NITROGEN DIOXIDE SULFUR DIOXIDE Sulfur dioxide mostly comes from the burning of coal or oil in power plants. It also comes from factories that make chemicals, paper, or fuel. Like nitrogen dioxide, sulfur dioxide reacts in atmosphere to form acid rain and particles. Sulfur dioxide expor them to breathe. It cansure can affect people who have asthma or emphysema by making it more difficult fo also irritate people's noses, throats and eyes, making it harder for people to see long distances. Sulfur dioxide can also harm trees, crops and damage buildings. LEAD A blue-gray metal that is very toxic and is found in a number of forms and locations. Lead comes from cars in areas where unleaded gasolins not used. Lead can also come from power plants and other industrial sources. High amounts of lead can be dangerous for small children and can lead to lower IQs and kidney problems. For adults, exposure to lead can increase the chance of having heart attacks or strokes. TOXIC AIR
POLLUTANTS A large number of chemicals that are known or suspected to cause cancer. Some important pollutants in this category include arsenic, asbestos, benzene, and dioxin. Each toxic air pollutant comes from a slightly different source, but many are created in chemical plants or are emitted when fossil fuels are burned. Toxic air pollutants can cause cancer. Some toxic air pollutants can also cause birth defects. Other effects depend on the pollutant, but can include skin and eye irritation and breathing problems. STRATOSPHERIC
OZONE DEPLETERS Chemicals that can destroy the ozone in the stratosphere. These chemicals include chlorofluorocarbons (CFCs), halons, and other compounds that include chlorine or bromine. CFCs are used in air conditioners and refrigerators, since they work well as coolants. They can also be found in aerosol cans and fire extinguishers. Other stratospheric ozone depleters are used as solvents in industry. If the ozone in the stratosphere is destroyed, people are exposed to more radiation from the sun (ultraviolet radiation). This can lead to skin cancer and eye problems. Higher ultraviolet radiation can also harm plants and animals. Effects of
Gases Examples of
Gases Damage to land near the coast Changes
Compositions Higher Sea Level Extreme Temperature Methane is released during the processing of fossil fuels, and also comes from natural sources like cows and rice paddies. Nitrous oxide comes from industrial sources and decaying plants. Carbon dioxide is
the most important greenhouse gas. It comes from the burning of fossil fuels in cars, power plants, houses, and industry. (cc) photo by theaucitron on Flickr (cc) photo by theaucitron on Flickr Gases that stay in the air for a long time and warm up the planet by trapping sunlight. This is called the “greenhouse effect” because the gases act like the glass in a greenhouse. Some of the important greenhouse gases are carbon dioxide, methane, and nitrous oxide. GREENHOUSE
GASES Greenhouse gases like methane, chlorofluorocarbons and carbon dioxide act as a shield that traps heat in the earth’s atmosphere. The resulting greenhouse gas effect is thought to contribute to global warming. Significantly changes the
normal or expected weather patterns
and conditions in a specific region of the Earth. When a particular region’s climate unpredictably changes from what it ought
to be, to one that should not be;
there are dire consequences
that occur. The greenhouse effect begins when
short wavelengths of visible light from the sun goes through a certain medium, but the infrared radiation it produces is unable to exit that medium and gets trapped inside. This causes the rise in temperature within the medium and it gets even hotter as more infrared radiation is retained. This medium that traps these infrared radiation are called greenhouse gases, which include water vapour, carbon dioxide and methane. These gases molecules, which have three or more atoms, are efficient in trapping infrared energy leaving the Earth, thus retaining its warmth in the planet. Global warming causes the
melting of polar ice caps, occurrences of more heat waves, warming of bodies of water, spreading of diseases and triggering economic changes. Global warming is the gradual
increase in the average temperature
of the Earth’s near-surface air and the oceans, which threatens its inhabitants; man, plant or animal. It is something that not only concerns a handful of people
or a few nations, but the
entire world. CLIMATE CHANGE GLOBAL
WARMING Coarse particles are formed from sources like road dust, sea spray, and construction. Submitted By:
Group Air Supply Fine particles are formed when fuel is burned in automobiles and power plants. CERP21 Submitted To:
Sir Riki Sandalo Carbon monoxide makes it hard for body parts to get the oxygen they need to run correctly. Exposure to carbon monoxide makes people feel dizzy and tired and gives them headaches.
Elderly people with heart disease are hospitalized more often when they are exposed to higher amounts of carbon monoxide. REDUCE AIR POLLUTION Step 1:
Save energy around the house. Step 2:
Manage your heating and cooling. Step 3:
Cut back on the amount of packaging you purchase and the amount of household waste you produce Step 4:
Reduce the amount of time you spend in the car. Step 5:
Improve your fuel economy.