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Genetic drift
Genetic drift is the term used in population genetics to refer to the statistical drift over time of gene frequencies in a population due to random sampling effects in the formation of successive ... > more -
Nitrogen oxide
NOx is a generic term for the various nitrogen oxides produced during combustion. They are believed to aggravate asthmatic conditions, react with the oxygen in the air to produce ozone, which is also ... > more -
Organic food
Organic food is produced according to legally regulated standards. For crops, it means they were grown without the use of conventional pesticides, artificial fertilizers or sewage sludge, and that ... > more -
Vegetation
Vegetation is a general term for the plant life of a region; it refers to the ground cover provided by plants, and is, by far, the most abundant biotic element of the biosphere. Vegetation serves ... > more -
Agriculture
Agriculture is the process of producing food, feed, fiber and many other desired products by the cultivation of certain plants and the raising of domesticated animals (livestock). The practice of ... > more -
Biodiversity
Biodiversity or biological diversity is the diversity of life. There are a number of definitions and measures of biodiversity. Biodiversity is commonly identified at three levels. First there is ... > more -
Hydroelectricity
Hydroelectricity is electricity obtained from hydropower. Most hydroelectric power comes from the potential energy of dammed water driving a water turbine and generator. Less common variations make ... > more
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