1. What is the use of house if you don't have a planet.
2. Acid rain destroys buildings and trees.
3. To keep ecology in balance is our duty.
4. Air pollution has become one of the health problems of our time.
5. Carbon dioxide is the main cause of greenhouse effect.
6. Deforestation is destroying large areas of tropical forest.
1. What is the use of house if you don't have a planet.
2. Acid rain destroys buildings and trees.
3. To keep ecology in balance is our duty.
4. Air pollution has become one of the health problems of our time.
5. Carbon dioxide is the main cause of greenhouse effect.
6. Deforestation is destroying large areas of tropical forest.