1. BBA Part1_5(Gajaseni, 2001)1

2. 2 What will happen if the ‘ Gaia Hypothesis ’ is true?

3. BBA Part1_5(Gajaseni, 2001)3

4. 4 Ecosystem: the true unit of sustainability

5. BBA Part1_5(Gajaseni, 2001)5

6. 6 1. Ecosystem disposes wastes and replenish nutrients by recycles. 2. Ecosystem uses sunlight as their energy source. 3. The size of consumer population is maintained such that overuse do not occur. 4. Biodiversity has been maintained.

7. BBA Part1_5(Gajaseni, 2001)7

8. 8 Why is an understanding of ecology essential for study of man and environment?

9. BBA Part1_5(Gajaseni, 2001)9 “ The problems of the human future range far beyond ecology, yet ecology is an essential part of them ” Robert H. Whittaker

10. BBA Part1_5(Gajaseni, 2001)10 Why do we have to care about Homo sapiens sapiens, a single species of organism on the earth ?

11. BBA Part1_5(Gajaseni, 2001)11 What is the most destructive species on the earth ?

12. BBA Part1_5(Gajaseni, 2001)12

13. BBA Part1_5(Gajaseni, 2001)13

14. BBA Part1_5(Gajaseni, 2001)14

15. BBA Part1_5(Gajaseni, 2001)15