The elements of our surroundings such as air, water, soil, weather, climate, etc. all make up our environment. If the natural relationships among these elements are disturbed, the ecological balance is hampered and this is termed environmental pollution. Our environment is polluted in many ways. Man makes fire for various purposes. This fire produces smoke and smoke pollutes the air. Again railway engines, mills, factories, buses, cars, and trucks also emit smoke and cause air pollution. Water, another vital element of the environment, is also polluted for various reasons. Chemical fertilizers and insecticides, filth and waste products of mills and factories are responsible for water pollution. Again, steamers, launches and even boats throw waste into in the rivers and pollute water.
