1. Once non-renewable energy sources are used they are gone forever. a. out b. up c. for d. off 2. Many chemicals have a damaging effect effect environment. a. on b. in c. to d. for 3. Renewable energy is also called” energy” because it doesn’t pollute the air. a. inexhaustible b. available c. clean d. dangerous 4. the pollution it cause, coal still plays an important role in the production of electricity around the world . a. Despite b. Due to c. Even though d. However 5. What if carbon dioxide levels continue to increase? a. happen b. will happen c. will be happened d. will be happening 6. The use of wind energy is growing rapidly because it is widely available and . a. environmental friendly b. environmental friendly c. environment friendly d. friendly environmental 7. Using solar panels at home can help your electric bill and your carbon footprint. a. reduce b.increase c. provide d. convert 8. Wind power is the most promising source of energy. a. non-renewable b.natural c. limited d. alternative 9. You can save much water by . a. using energy saving light bulbs b. using biogas for cooking c. taking showers instead of baths d. walking or riding a bike to school 10. ‘Is it difficult to reduce our carbon footprints?’ ‘ ’ a. It depends on the way you think. b. Not at all. Just practicing the 3R’s. c.It’s not if we still rely on fossil fuels. d. I’m not sure. What will happen?