The sun shines every day for all of

The sun shines every day for all of us, free
of charge. And the wind blows for free. But
non-renewable energy sources can cost a
lot of money to find and move. We must
take the fossil fuels from the ground and
ship them long distances to places where
they can be used. Oil must be refined
before it can be used. This is expensive. We
also have to pay to clean up the pollution
they cause. And as coal and oil supplies get
used up, their prices get higher.