1. What are the two groups of natural resources?
2. Without what we cannot live even for a while?
3. What is the crisis we are facing?
4. Which fuel has brought air pollution under control?
5. Which is Israel's only river?
6. What makes soil saline?
7. What are a very important part of our natural wealth?
8. What are an integral part of forest?
9. What is producing plants and animals in a laboratory called?
Originally posted 2015-12-22 23:13:14.