II . Give the collect 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 problemof . . . ( 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 )