_______ _________ are those that are always being replaced and will not run out.
Renewable Resources
_________ ________ are those that cannot be replaced quickly enough to keep from running out.
Nonrenewable resources
_________ is the presence of substance that are harmful to the environment or to living things.
pollution
A ______ ____ is any fuel that formed from the remains of plants and animals that lived millions years ago.
Fossil Fuel
____________ _____ is electricity produced by the energy in moving water.
Hydroelectric power
_______ is plant material and animal waste used as fuel.
Biomass