are those that are 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 substances that are harmful to the environment or to living things
Pollution
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.
Hydro Electricity
is plant and animal used as fuel
Biomass