1. Solar energy is renewable, __________ and clean. PLENTY 2. We should reduce the use of__________ at home. ELECTRIC 3. Waves will be used as an__________ friendly source of energy. ENVIRONMENT 4. Solar power can be used to__________ or cool our houses. HOT 5. There will be a__________ of energy in the near future. SHORT 6. Scientists are looking for clean and __________ sources of energy. EFFECT 7. More renewable energy sources will be used to solve the problem of__________. POLLUTE 8. __________ fossil fuels are harmful to the environment. FORTUNATE. 9. The __________ of wind turbines will be completed by next Friday. INSTALL 10. __________ particles reach the Earth in just 8 minutes. ENERGY