Available Answers

1. 1.

   What are the major effects of deforestation?

2. 2.

   How is air pollution harmful to us?

3. 3.

   What is the greenhouse effect?

4. 4.

   What is global warming?

5. 5.

   What is the difference between endangered and extinct animals?

6. 6.

   What would happen if there is less amount of oxygen in the air?