Match the types of resources with their descriptions.
renewable resources
nonrenewable resources
both renewable and nonrenewable
A They can be reproduced on a human timescale
B They take millions of years to form
C They are produced naturally
D They are extracted by mining
E their use as an energy source is increasing because they reduce pollution
renewable resources - A, C
nonrenewable resources - B, D
both renewable and nonrenewable - E