- The contamination of air, water, or soil by substances that are harmful to living organisms is called pollution. A pollutant is a waste material that pollutes air, water or soil.
- Three factors determine the severity of a pollutant: its chemical nature, the concentration and the persistence
- Pollution can occur naturally, for example through volcanic eruptions, or as the result of human activities, such as the spilling of oil or disposal of industrial waste.
Major forms of pollution:
- Air pollution: release of chemicals and particulates into the atmosphere.
- Water pollution: release of waste products and contaminants into water bodies.
- Soil pollution: occurs when chemicals are released by spill or underground leakage.
- Noise pollution: encompasses roadway noise, aircraft noise, industrial noise etc.
The focus of this chapter will be on
- air pollution, the quickest medium to get polluted and
- water pollution, the commonest type of pollution