The products which are released into the biosphere in large quantities and which affect the normal functioning of ecosystems:

1. Pollution
2. Dust
3. Humidity
4. Pollutants

Unfavourable alteration of our surroundings, wholly or largely as a by-product of man's actions:

1. Pollution
2. Environmental Pollution
3. Humidity
4. Pollutants

The pollutants which are formed from the chemical reaction of primary pollutants in the environment:

1. Biodegradable pollutants
2. Secondary pollutants
3. Quantitative pollutants
4. Non-Biodegradable pollutants

The excessive concentration of foreign matter in the air which adversely affects the well-being of human beings, animals, plants and their environment:

1. Air Pollution
2. Pollution
3. Soil Pollution
4. Radioactive Pollution