4. Ask questions to which the following sentences are the answers:

1. The Greenhouse effect is the rise in temperature that the Earth experiences because certain gases in the atmosphere trap energy from the sun.

2. When you recycle, you send less trash to the landfill and help save natural resources, like trees, oil, etc.

3. Pollution has its origin in the Latin word ‘polluere’, means ‘contamination of any feature of the environment’.

4. Scientists suspect that in many places global warming will increase the number of very hot days that occur during the year.

5. Rainforests contributes to the water and carbon cycles on which all life depends.