III. Give the correct form of the words given to complete the sentences: 1. Scientists are looking for clean and..........................sources of energy. EFFECT 2. We should reduce the use of..............................at home. ELECTRIC 3. Solar power can be used to.................................or cool our houses. HOT 4. Solar energy is renewable,...............................and clean. PLENTY 5. There will be a..................................of energy in the near future. SHORT 6. More renewable energy sources will be used to solve the problem of .......... POLLUTE 7. Waves will be used as an...............................friendly source of energy. ENVIRONMENT 8............................particles reach the Earth in just 8 minutes. ENERGY used Windpower...........................................at this time next year. 9.................................., fossil fuels are harmful to the environment. FORTUNATE 10. The...........................of wind turbines will be completed by next Friday. INSTALL