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Geophony, Biophony, and Anthrophony
What do these words mean? Biophony is the melodic sound created by such organisms as frogs and birds; geophony, the composition of non-biological sounds like wind, rain and... More »
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A Walk Through Time
The Evolution of Time Measurement through the Ages. A Walk Through Time Ancient Calendars Celestial bodies — the Sun, Moon, planets, and stars — have... More »
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Environmental Kuznets curve for biodiversity...
The environmental Kuznets curve (EKC) for biodiversity conservation is a hypothesis describing a particular relationship between economic prosperity and the... More »
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Aerial Exploration of the Antarctic
Exploration of the Antarctic - Part 10 In the late 1920s, exploration of the Antarctic was revolutionized by the advent of aircraft. At the turn... More »
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National Ecological Observatory Network:...
NSF Awards Construction Funding to National Ecological Observatory Network Long-awaited, continent-wide network of environmental observing sites gets off the... More »
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Mapping the environment
This article, authored by Kellyn S. Betts, appeared first in Environmental Health Perspectives—the peer-reviewed, open access journal of the National Institute of... More »
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Spiral Pine Needle Cookstove
Spiral Pine Needle Cookstove Challenge In Uttrakand, India, wood fuel is a scarce commodity, as it is illegal to cut branches from the government-owned pine trees. The... More »
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Agriculture II
Humans began to cultivate food crops about 10,000 years ago. Prior to that time, hunter-gatherers secured their food as they traveled in the nearby environment. When they... More »
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SS Gairsoppa recovery
The SS Gairsoppa recovery is a planned deep-sea operation in the North Atlantic Ocean, that is expected to retrieve the world's largest precious metals shipwreck salvage in... More »
Natural gas
Last Updated on 2013-05-08 at 17:54
Natural gas is a gas consisting primarily of methane (CH4). It is found as a raw naturally occurring gas in underground reservoirs, as gas associated with underground... More »
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Technological innovation
Last Updated on 2013-03-26 at 16:20
Technology innovation is the process through which new (or improved) technologies are developed and brought into widespread use. In the simplest formulation, innovation can be... More »
Opportunities and constraints from genetic...
Last Updated on 2013-03-04 at 19:25
Introduction
Africa’s experience with genetic modification (GM) technologies is still relatively new compared to other regions and it is faced with many... More »
Economic recovery in the Great Depression
Last Updated on 2013-02-24 at 21:44
The Great Depression has two meanings. One is the economic contraction of 1929-33, during which unemployment rose from three to 25 percent, as the nation's output fell over... More »
Snow removal in the United States
Last Updated on 2013-02-10 at 18:31
Introduction
Snowstorms have historically plagued many states, notoriously those located in the Northeast and Midwest. Winter storms occur all over the country, but... More »
Metal stocks in use in the United States
Last Updated on 2012-09-04 at 10:09
Metal stocks in use in the USA involve large quantities of metals over the last century. Most of these metals have remained in use either in their... More »
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