“Pollution in Cities”
Pollution is one of the major problems today. Development of industries has led to progress. But there are many ill-effects of this progress. There is pollution in air, on land and in water. Pollution in cities is mainly due to the increasing number of vehicles. Air is polluted because of the smoke, chemicals and gases. Besides, there is noise pollution because of honking of vehicles, microphones, loudspeakers and fireworks during festivals. Factories pollute water by dumping chemical waste in it. Polluted water spreads diseases and is harmful to agricultural products and soil. Dumping of garbage in the open also causes pollution. We must grow more trees and protect our forests. We must keep our houses and surroundings clean. We must stop polluting the sources of water.