Non-polluting source of energy.

A highly caffeinated, sometimes carbonated, beverage containing added ingredients advertised as increasing alertness, performance etc.

An economic problem caused by a dwindling supply of energy, at an increasing price.

The condition of a region, country or household not having enough energy resources for the needs of its population.

plural of energy drink

The range of energy sources of a region, either renewable or non-renewable.

(idiomatic) One who is especially lively, continually active, or industrious. / (idiomatic) The energy associated with being lively, continually active, or industrious.

A condition of excessive energy consumption, usually by a nation or other large collective. The symptoms may be expressed in the form of energy commodity price volatility, environmental degradation, and energy-trade-induced geopolitical tension.

(physics) A natural unit of energy, equivalent to the mass energy of a Planck particle (m_Pc²) or the energy per quantum at a temperature of one Planck temperature (kT_P).

The energy released by an atom in a nuclear reaction.