Solar output
The amount of energy radiated by the sun at a given time.
Conifer
Conifer
A plant that bears its seeds in cones. Usually refers to NEEDLELEAF trees, although some needleleaf trees, such as the yew, do not bear cones.
Greenhouse effect
Greenhouse effect
The trapping of heat by gases, such as carbon dioxide, methane, and nitrous oxides in the Earth’s atmosphere.
Subtropical
Subtropical
The latitudinal zone between 23.5° and 34.0° in either hemisphere, bordering the tropical zone; also the vegetation, organisms, and climate typical of this zone.
Biosphere
Biosphere
The part of the Earth’s crust, water, and atmosphere where organisms can exist.
Conservation
Conservation
The use of natural resources in a way that assures their continuing availability to future generations; the intelligent use of natural resources for long-term benefits.
Greenhouse gases
Greenhouse gases
Gases in Earth’s lower atmosphere (troposphere) that trap heat. Examples are carbon dioxide, methane, nitrous oxide, and water vapor.
Temperate
Temperate
Having a generally moderate climate; the temperate zone is the region between the Tropic of Cancer and the Arctic Circle, or between the Tropic of Capricorn and the Antarctic Circle.
Albedo effect
Albedo effect
A measure of how much of the sun’s energy is reflected from Earth back into space.
Cyrosphere
Cyrosphere
The frozen water part of the Earth system, including areas with snow, glaciers, sea ice, and frozen earth.
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