A technology that involves the nuclear reactions of atomic nuclei.

Nuclear safety is defined by the International Atomic Energy Agency (IAEA) as "The achievement of proper operating conditions, prevention of accidents or mitigation of accident consequences, resulting in protection of workers, the public and the environment from undue radiation hazards".

Nuclear reprocessing is the chemical separation of fission products and unused uranium from spent nuclear fuel.

Since about 2001 the term nuclear renaissance has been used to refer to a possible nuclear power industry revival, driven by rising fossil fuel prices and new concerns about meeting greenhouse gas emission limits.

The Nuclear Regulatory Commission (NRC) is an independent agency of the United States government tasked with protecting public health and safety related to nuclear energy.

The three primary objectives of nuclear reactor safety systems as defined by the U.S.

A nuclear reactor core is the portion of a nuclear reactor containing the nuclear fuel components where the nuclear reactions take place and the heat is generated.

A nuclear reactor, formerly known as an atomic pile, is a device used to initiate and control a fission nuclear chain reaction or nuclear fusion reactions.

A nuclear power plant is a thermal power station in which the heat source is a nuclear reactor. The produced thermal energy is used to generate steam that drives a steam turbine connected to a generator that produces electricity.

Nuclear power is the use of nuclear reactions to produce electricity. Nuclear power can be obtained from nuclear fission, nuclear decay and nuclear fusion reactions.

Nuclear potential energy is the potential energy of the particles inside an atomic nucleus.

Nuclear physics is the field of physics that studies atomic nuclei and their constituents and interactions.

A nuclear meltdown is a severe nuclear reactor accident that results in core damage from overheating.

Nuclear fusion is a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles (neutrons or protons).

The progression of nuclear fuel through a series of differing stages.

Greenfield status is an end point wherein a parcel of land that had been in industrial use is, in principle, restored to the conditions existing before the construction of the plant.

Green waste can be composed of non-food crops, which decompose to produce cellulosic ethanol.

A green roof or living roof is a roof of a building that is partially or completely covered with vegetation and a growing medium, planted over a waterproofing membrane.

Green politics, or ecopolitics, is a political ideology that aims to foster an ecologically sustainable society rooted in environmentalism, nonviolence, social justice and grassroots democracy.

A green retrofit is any refurbishment of an existing building that aims to reduce the carbon emissions and environmental impact of that building.