There are nine major areas of energy resources. They fall into two categories: nonrenewable and renewable. Nonrenewable energy resources, like coal, nuclear, oil, and natural gas, are available in limited supplies. This is usually due to the long time it takes for them to be replenished. read more
Natural resources are materials or things that people use from the earth. There are two types of natural resources. The first are renewable natural resources. They are called renewable because they can grow again or never run out. The second are called nonrenewable natural resources. These are things that can run out or be used up. read more
Renewable energy sources such as solar and wind replenish naturally in a short period of time. The four major nonrenewable energy sources are - Crude oil - Natural gas - Coal - Uranium (nuclear energy) Nonrenewable energy sources come out of the ground as liquids, gases, and solids. read more