Expert-reviewed information about the Earth. For everyone.
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West Nile Virus
Since 1999, more than 30,000 people in the United States have been reported as getting sick with West Nile virus. Infected mosquitoes spread West Nile virus (WNV) that can... More »
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Petrochemicals
Petrochemicals are chemical products made from the hydrocarbons present in raw natural gas and petroleum crude oil. The largest petrochemical manufacturing industries are to... More »
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Dudleya cymosa (Lem.) Britt. & Rose
Dudleya cymosa (Lem.) Britt. & Rose is a perennial low-growing succulent plant species that is endemic to California. Having a number of subspecies, this fleshy plant is... More »
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Ecological pyramids
Ecological pyramids are diagrams that illustrate how ecologically important factors, such as energy, biomass, and population size, vary between trophic levels in an ecosystem.... More »
Eastern Miombo woodlands
Last Updated on 2013-05-22 at 21:56
Confined to the lower elevations of the Central African Plateau, the Eastern Miombo woodland ecoregion ranges from southern Tanzania to northern Mozambique and... More »
Balsam fir
Last Updated on 2013-05-22 at 21:48
This plant guide on the Balsam fir, Pinus balsamea L., was chiefly prepared and contributed by the U.S. Department of Agriculture's Natural Resources Conservation... More »
Andaman Islands rainforests
Last Updated on 2013-05-22 at 21:38
Located between the Bay of Bengal and the Andaman Sea, between India to the west and Myanmar to the east, the Andaman Islands are affiliated with both countries in... More »
Fair Trade for Agriculture in Ethiopia
Last Updated on 2013-05-22 at 21:13
Brief Introduction of Fair Trade
While no officially accepted definition exists, fair trade is widely recognized as a certification to represent a good that was produced... More »
Cuban moist forests
Last Updated on 2013-05-22 at 20:46
The Cuban moist forests originally held exceptionally distinctive insular flora and fauna, with many species, genera and families unique to its forests in the form of relict... More »
Valdivian temperate forests
Last Updated on 2013-05-22 at 01:13
The Valdivian temperate forests and the more hygrophilous vegetation of the Mediterranean area of central Chile, represent a true biogeographic island separated from... More »
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