IV. Give the correct form of the words given to complete the sentences. 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 house. (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)