Question

Currently, one major disadvantage of renewable energy resources is that renewable energy resources _____ than fossil fuels.
a. are more rare
b. pollute less
c. pollute more
d. are more expensive

Answer 1

Currently, one major disadvantage of renewable energy resources is that renewable energy resources are more expensive  than fossil fuels.


d. are more expensive

Answer 2

Solar energy technology is currently very expensive, but it is completely renewable and non-polluting. New advances in technology will hopefully make it cheaper in the future.

D!