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climate targets may aim to reduce greenhouse gas emissions by a certain amount
over a certain amount of time.
Cofiring
When natural gas is burned in conjunction with another fuel in order to reduce air
pollutants.
Cogeneration
The production of electrical energy and another form of useful energy (such as heat
or steam) at the same time.
Cogeneration system
A system that uses a common energy source to produce both electricity and steam.
This results in increased fuel efficiency.
Combined heat and power (CHP) plant
A plant that is designed to produce both heat and electricity from a single heat
source. Note: This term is now being used instead of the term "co-generator" that
was used by EIA in the past.
Combined pumped-storage plant
A hydroelectric power plant that uses both pumped water and the natural flow of
water to produce electricity.
Commercial building
A building with more than 50% of its floor space used for commercial activities. This
includes stores, offices, schools, churches, gyms, libraries, museums, hospitals,
warehouses, and jails. Government buildings are also commercial buildings unless
they are on military bases or reservations.
