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acid rain |
rain that contains acid from pollution. |
air quality |
the degree that the air in a particular environment contains pollution. |
antipollution |
designed to decrease or stop pollution of the environment. [2 definitions] |
clean |
pure; free from pollution. [1/6 definitions] |
clear |
used to describe the sky when there are no clouds or when there is little pollution or dust. [1/4 definitions] |
coliform bacillus |
any of several bacilli normally found in human and animal colons, the count of which in water is used to determine the presence or extent of fecal pollution. |
conservation |
the protection of natural resources, such as soil, water, or forests, from loss, pollution, or waste. [1/2 definitions] |
fly ash |
fine, often airborne particles of ash derived from the burning of solid fuel and recognized as a factor in air pollution. [1/2 definitions] |
green |
of an institution or business, conserving as much energy as possible and contributing little to environmental pollution. [2/11 definitions] |
nonpolluting |
causing no pollution. |
PCV |
abbreviation of "positive crankcase ventilation," the flow of engine exhaust fumes into an auto engine's cylinders as part of a pollution control system. |
PCV valve |
a one-way valve that regulates the flow of engine exhaust fumes into an auto engine's cylinders, as part of a pollution control system. |
Rankine-cycle engine |
a type of steam engine in which the water that is evaporated into steam is condensed and recycled, developed experimentally as a pollution-reducing alternative to the internal combustion engine. |
smog |
a mixture of smoke and fog that is caused by moist air and human pollution. |
sustainable development |
a process of social and economic development that meets the needs of the present without compromising the ability of future generations to meet their own needs, esp. with respect to natural resource depletion and environmental pollution. |
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