1. Pollution

2. Define the term Pollution
The addition to an environment of a substance or an agent by human activity, at a rate greater than that at which it can be rendered harmless by the environment, and which has an appreciable effect on the organisms within it. (IB definition)

3. Types of Pollution Point source Non-point source
Source:

4. Major Sources of Pollution
Combustion of fossil fuels
Domestic waste
Industrial waste
Manufacturing
Agricultural systems