Across
- 4. It can ruin buildings as it eats into metal and stone.
- 6. Rain water harvesting is a way to ____________ water
- 7. They are left behind on burning solid fuels.
- 8. The water which is fit for drinking
Down
- 1. It is a major problem in survival of marine wildlife.
- 2. Moving air is called____________
- 3. Improper dumping of garbage leads to ______
- 4. Thick blanket around the earth.
- 5. The gas released from cattle as they digest their food.