Pollution manifests itself in following forms:
- Air pollution: This means the release of chemicals and particulates into the atmosphere. Common air pollutants are CO2 , SO2 , chlorofluorocarbons( CFCs ) and nitrogen oxides produced by industries and automobiles. CFCs cause holes in Ozone layer.
- Water pollution: This is caused by the release of waste products and contaminants into water bodies. Industries like tanneries and dyeing are especially notorious for this.
- Soil contamination: Chemical fertilizers, pesticides, herbicides used by farmers mix with soil and make it infertile.
- Radioactive contamination: Nuclear power generation, though very cheap source of power, has not come without its fallouts. The waste products generated in these activities is radioactive and is difficult to dispose off.
- Noise Pollution: This includes roadway noise, aircraft noise, industrial noise, as well as high-intensity sonar.
Effects Of Pollution
Pollution is known to cause many diseases many of them directly and some indirectly. It is also responsible for decrease in immunity and longer recuperation periods. Air pollution can cause lung and heart diseases. Smoke emanating from vehicles and chimneys can also cause irritations in eyes.
Due to global warming, the world is facing problem of greenhouse effect. The ice at the Antarctica and Arctic ocean is melting fast and causing alarming rise in sea levels. Pollution has caused concerns the world over. Several voluntary organizations have sprung up to increase awareness of this problem and to fight this menace. School textbooks are making future leaders aware of this problem.