General Source of Pollution:
The source of pollution caused by man-made actions can be grouped under four categories:
1. Mobile Transport: Motor cars, motorbikes, aircraft, ships, vapourization of gasoline.
2. Stationary/immobile combustion: Domestic, business sources, steam power-driven and thermal power plants.
3. Factories and industry processes: Metal and non-metal extractions, paper, and pulp, oil refiners, synthetic chemicals, and food processing industries.
4. Disposal of solid waste: Domestic and mercantile refuse, refuse from coal combustion, burning of agricultural refuse.