Tuesday, April 21, 2009

Air Pollution

Nowadays, air pollution become more serious. It will cause global warming, green house effects, acid rain & etc...

Air pollution changes our planet’s climate, but not all types of air pollution have the same effect. There are many different types of air pollution. Some types cause global warming to speed up. Others cause global warming to slow down by creating a temporary cooling effect for a few days or weeks. Read on the learn more about the pollution that causes Earth to warm and the pollution that causes Earth to cool.



Air pollutants cause more global warming -Air pollution includes greenhouses gases. One of these is carbon dioxide, a common part of the exhaust from cars and trucks. Greenhouse gases cause global warming by trapping heat from the Sun in the Earth’s atmosphere.

Air pollutants cause temporary global cooling - Cars, trucks, and smokestacks also release tiny particles into the atmosphere. These tiny particles are called aerosols. They can be made of different things such as mineral dust, sulfates, sea salt, or carbon. Some of these tiny particles block a little bit of the Sun’s energy from getting to Earth. Some of these particles get into the atmosphere naturally. They are dust lifted into the atmosphere from deserts, from evaporating droplets from the ocean, released by the smoke from wildfires, and erupting volcanoes. But air pollution released by humans by burning of fossil fuels also adds them to the atmosphere.



In addition, acid rain will harms living things. When acidic air pollutants combine with water droplets in clouds, the water becomes acidic. When those droplets fall to the ground, the acid rain can damage the environment. Damage due to acid rain kills trees and harms animals, fish, and other wildlife. Acid rain can destroy the leaves of plants like in the picture at the left. When acid rain soaks into the ground, it can make the soil an unfit habitat for many living things. Acid rain also changes the chemistry of the water in lakes and streams, harming fish and other aquatic life.


Air pollution will cause the ozone layer become thinner. In this case, the strong UV ray from sun will cause skin cancer. All of these effects that cause by air pollution will destroy our live. Therefore we need to find out the solution that can reduce air pollution...