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hadi salman
June 14, 2013 11:06AM

i ask did demulsifier cause damage to catalysis in refinery process with referen...
hadi salman
June 14, 2013 11:06AM

i want ask about catalysis
Erich Knight
June 08, 2013 05:06AM

The Clovis people & the Younger Dryas knocked out 80% of large land mammals ...
SATHISH KOKKULA
June 04, 2013 08:06PM

Very clear and concise information.

Land-use & Land-cover Change

Land-use & Land-cover Change

    • Daugava River Featured Article Daugava River Daugava River

      The Daugava River drains portions of the countries of Latvia, Belarus, Estonia and Russia, prior to discharging to the Gulf of Riga. Also known as the West Dvina River, this... More »

    • Overgrazing Featured Article Overgrazing Overgrazing

      Overgrazing is herbivory (animal comsumption of plants) that extracts an unsustainable yield of floral biomass from an ecosystem; however, the term is most often... More »

    • Yellow Fever Featured Article Yellow Fever Yellow Fever

      Introduction Centers for Disease Control and Prevention     Yellow fever is a viral disease that is transmitted to humans... More »

    • Tokelau Featured Article Tokelau Tokelau

      Tokelau is group of three low-lying coral atolls (Atafu, Fakaofo, Nukunonu) enclosing large lagoons in the South Pacific Ocean, about one-half of the way from Hawaii to New... More »

    • Poverty and National Parks Featured Article Poverty and National Parks Poverty and National Parks

        Many poor people live around national parks in developing countries. Does that mean that these parks are contributing to their poverty? Living on the Edge of... More »

    • Barrier island Featured Article Barrier island Barrier island

      The term barrier islands might conjure images of beaches, boardwalks, and vacation homes for some, but barrier islands function as more than just areas for tourism and... More »

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Switzerland Last Updated on 2013-06-18 at 20:12 Switzerland is a landlocked nation of over seven-and-a-half million people in central Europe, east of France, north of Italy.  It is at the crossroads of northern and... More »
Desertification Last Updated on 2013-06-14 at 22:09 Desertification is the persistent degradation of dryland ecosystems due to human activities and variations in climate. While climate oscillations have historically had... More »
Albedo Last Updated on 2013-05-27 at 03:21 Introduction Albedo is the fraction of Sun’s radiation reflected from a surface. The term has its origins from the Latin word albus, meaning “white”.... More »
Deforestation in Amazonia Last Updated on 2013-04-05 at 17:29 Introduction Tropical forests in Amazonia are being cleared rapidly, representing an important worldwide element of land-use and land-cover change. While... More »
Ecoregions of Texas (EPA) Last Updated on 2013-03-27 at 15:18   http://www.lib.utexas.edu/geo/pics/ecoregionsoftexas.jpg Ecoregions denote areas of general similarity in ecosystems... More »
English Lowlands beech forests Last Updated on 2013-03-22 at 13:16 The English Lowlands beech forests occupy much of the south of England, and are part of the Temperate broadleaf and mixed forests biome. The dominant [catchment] of the... More »
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