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