1. ____ is the dumping of refuse on the soil
2. ___are harmful substances introduced into the environment by man
3. Lead dust is an example of ____ pollutants
4. The abiotic Co of ecosystem include all except ___
5. ____&___ are the components of ecosystem
6. Which of these is not an example of water pollutants
7. Soil pollution can be controlled using the following except
8. Which of the following is odd in the group
9. The process whereby certain organisms eg green plants use sunlight or chemicals to manufacture their food is called ___
10. The process by which green plants manufaure their own food using sunlight is called ___
1a. Differentiate between autotrophy and heterotrophy
3a. Write on the following
