XII

1. for a long time people have used water to power machines 

2. solar panels can be placed on the roof of a house and sun's energy will be used to heat water

3. we use energy from the sun the wind and the water 

4. many countries have already been using solar energy

5. the earth's fossil fuels will be running out

6. we are looking for a cheap clean effective source of energy which doesn't cause pollution or waste natural resources

$XII.$

1/ For a long time people have used water to power machines.

2/ Solar panels can be placed on the roof of a house and sun's energy will be used to heat water.

3/ We use energy from the sun, the wind and the water.

4/ Many countries have already been using solar energy.

5/ The earth's fossil fuels will be running out.

6/ We are looking for a cheap clean effective source of energy which doesn't cause pollution or waste natural resources.