FACTORY OWNERS LET THE WASTE RUN DIRECTLY TO THE SEA.CIRCLE THE WOR...

4. Factory owners let the waste run directly to the sea.

Circle the word or phrase that best fits the blank space in the following

passage:

Many countries are already using (1)_________ energy. Solar (2)_________ are placed

on the roofs of a house and the Sun’s energy is used to (3)_________ water. The energy

can be stored for a number of days, so on (4)_________ days you can use solar energy,

too. Sweden has an (5)_________ solar energy program. There, all buildings will be

heated by solar energy and cars (6)_________ solar power instead of gas by the year