Water, trees, air and oil are ........
natural resources.
Oil is a ....... fuel.
fossil
Car fuel is made from .....
oil.
If we save natural resources, the future could be .......
bright.
Wind and sunlight are ......... resources.
renewable
We need natural resources to ..........
live.
Gas and coal are ............ resources.
non-renewable
Gas and coal come from deep ..........
underground.
If we run out of natural resources, the future could be .......
bleak.
Moving water has .......
energy.
All fossil fuels are ......... resources.
non-renewable
If we use natural resources .........., they will last into the future.
carefully
When electricity runs out, it is called a ........
blackout.