anaerobic respiration
Form of cellular respiration in which some decomposers get the energy they need through the breakdown of glucose (or other nutrients) in the absence of oxygen.
Subject:
Environmental Science
Forum reference:
Book page:
http://course-notes.org/Environmental_Science
altitude
Height above sea level. Compare latitude.
Subject:
alley cropping
Planting of crops in strips with rows of trees or shrubs on each side.
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allele
Slightly different molecular form found in a particular gene.
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air pollution
One or more chemicals in high enough concentrations in the air to (1) harm humans, other animals, vegetation, or materials or (2) alter climate. Excess heat and noise are also considered forms of air pollution. Such chemicals or physical conditions are called air pollutants. See primary pollutant, secondary pollutant. albedo Ability of a surface to reflect light.
Subject:
agroforestry
Planting trees and crops together.
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agricultural revolution
Gradual shift from small, mobile hunting and gathering bands to settled agricultural communities in which people survived by learning how to breed and raise wild animals and to cultivate wild plants near where they lived. It began 10,000-12,000 years ago. Compare environmental revolution, hunter-gatherers, industrial revolution, information and globalization revolution.
Subject:
age structure
Percentage of the population (or number of people of each sex) at each age level in a population.
Subject:
aerobic respiration
Complex process that occurs in the cells of most living organisms, in which nutrient organic molecules such as glucose (C6H12O6) combine with oxygen (O2) and produce carbon dioxide (CO2), water (H2O), and energy. Compare photosynthesis.
Subject:
advanced sewage treatment
Specialized chemical and physical processes that reduce the amount of specific pollutants left in wastewater after primary and secondary sewage treatment. This type of treatment usually is expensive. Also tertiary sewage treatment. See also primary sewage treatment, secondary sewage treatment.
Subject:
Pages
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