Available Answers

1. 1.

   Name some natural pollutants and anthropogenic pollutants.
2. 2.

   Name the primary polluting gases.
3. 3.

   Name two suspended and two dissolved impurities present in fresh water
4. 4.

   Name some of the metals which are injurious to health.
5. 5.

   What are the adverse effects of carbon dioxide on the environment?