The contamination of the environment with toxic and poisonous substances due to certain natural phenomena or human activities is called Pollution.
Air is very important for all living beings. One can survive without food for few days, but without air, one cannot survive even for few minutes. Thus air is essential for all of us.
When air is contaminated by the introduction of chemicals, particulate matter, or biological materials that cause harm or discomfort to humans or other living organisms, or damages the natural environment, it is referred to as air pollution.
Causes of air pollution:-
- Smoke and dust arising from forest fires or volcanic eruptions.
- Exhaust from vehicles.
- Exhaust from industries.
- Pollutants from home.
- Suspended particulate matter.
Green House Effect:-
Other planets in the solar system are extremely hot or bitterly cold, the earth’s surface relatively mild and stable temperature. The earth is covered with a thin blanket of air called the atmosphere. The sun’s rays warm the earth’s surface. The trapped heat warms the earth just like the heat trapped by the atmosphere. This trapped heat warms the earth just like the heat trapped in a greenhouse in a nursery warms it. The trapping of the radiations by the earth’s atmosphere is similar to this. That is why it is called the earth. But now it is threatening life. Carbon dioxide (CO2) is one of the gases responsible for this effect.
Carbon dioxide is continuously being released because of human activities. On the other hand, the area under forest is decreasing. Deforestation leads to an increase in the amount of carbon dioxide in the air. As a result, the average temperature of the earth’s atmosphere is gradually increasing. This is called global warming. These are called greenhouse gases.
Prevention of air pollution;-
- Improving the quality of fuels in automobiles and using catalytic converters in them. The use of CNG in automobiles has reduced air pollution in our metro cities considerably.
- Replacing wood, coal, and kerosene with LPG for domestic use.
- Using alternative sources of energy like solar energy, wind energy, thermal energy etc.
- Using better technology to control the level of pollutants in the emissions.
We can also contribute to control air pollution;-
- Encourage your family and friends to walk to neighbourhood places.
- Whenever possible take your bicycle. Use the public form of transport.
- Look after the trees in your neighbourhood, if possible adopt a tree.
- Switch off all the lights and fans when not required. If possible share your room with others when the air conditioner, cooler or fan is on.
- Do not burn leaves, plastics etc. Compost the fallen leaves.
- Participate in your local utility’s energy conservation, plantation and other eco-friendly programmes.