FOSSIL FUELS are a LIMITED source of energy
We need to PROVIDE food
One SOLUTION to the problem of CLIMATE CHANGE
You need to REMOVE the salt from sea water
Some people think we should REDUCE the amount of energy we use
We produce STEAM
A GREENHOUSE is a hot place with large glass windows
for more and more people.
when we HEAT water.
where we can GROW plants.
to make it DRINKABLE.
but solar energy is UNLIMITED.
is to use ALTERNATIVE sources of energy.
not INCREASE it.
