Remains of long-dead organisms that now serve as an energy source, such as as oil, coal, or natural gas.
Natural resource that is used up faster than it can be made by nature.
Nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into smaller parts, often producing free neutrons and photons in the form of gamma rays, and releasing a very large amount of energy.
Electricity generated through the use nuclear energy (fission) inside a nuclear reactor.
Describes characteristics of nonrenewable resources.