WHAT IS AIR POLLUTION? We can survive for some time without food, but we cannot survive even for a few minutes without air. This simple fact tells us how important clean air is to us. &nbs
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HOW DOES AIR GET POLLUTED? The substances which contaminate the air are called air pollutants. Sometimes, such substances may come from natural sources like smoke and dust arising from forest fires
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CASE STUDY – THE TAJ MAHAL Over the past 2 decades, India’s most famous tourist attraction, Taj Mahal located in Agra (Fig. 18.4), has become a matter of concern. Experts have warned th
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GREENHOUSE EFFECT You know that the sun’s rays warm the earth’s surface. A part of the radiation that falls on the earth is absorbed by it and a part is reflected back into space.
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WHAT CAN BE DONE? What can we do to reduce air pollution? There are many success stories in our fight against air pollution. For example, a few years ago, Delhi was one of the most polluted citi
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