Brown energy or brown power are terms that have been coined to describe energy produced from polluting sources as a contrast to
green energy
Energy is sustainable if it "meets the needs of the present without compromising the ability of future generations to meet their own needs." Definitions of sustainable energy usually look at its effects on the environment, the economy, and so ...
from renewable, non-polluting sources. The term "grey energy" or "gray energy" has been used instead, including by the United Nations.
See also
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Brownout (electricity)
A brownout is a drop in the magnitude of voltage in an electrical power system.
Unintentional brownouts can be caused by excessive electricity demand, severe weather events, or a malfunction or error affecting electrical grid control or monito ...
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Energy