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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.

Environmental History

Environmental History

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      Situated near the Black Sea in the Dobrogea region, Histria is the oldest town in present day Romania,  With clear Neolithic roots, the first substantial... More »

    • The spirit of the first Earth Day Featured Article The spirit of the first Earth Day The spirit of the first Earth Day

      April 22, 2012, marks the 42nd anniversary of Earth Day. What started as a national effort in the U.S. to raise awareness about the environment has now spread to include Earth... More »

    • Atlantic period Featured Article Atlantic period Atlantic period

      The Atlantic period is a post-Last Glacial Maximum (LGM) European climate regime. This refers to the period from about 6,000-3,000 BC that spans most of the warmest postglacial... More »

    • Medieval Warm Period Featured Article Medieval Warm Period Medieval Warm Period

      The Medieval Warm Period (MWP) refers to a time interval between AD 900 and 1300 in which some Northern Hemisphere regions were warmer than during the period known as the... More »

Recently Updated
Nonpoint source Last Updated on 2013-06-18 at 02:18 A nonpoint source refers to a source of pollution from an origin other than a well defined point. The term is most often applied to air pollution, water pollution and noise... More »
Tyrrhenian Sea Last Updated on 2013-05-13 at 22:35 The Tyrrhenian Sea is a region of the Mediterranean Sea to the west of Italy, east of Corsica and Sardinia, and north of Sicily A number of major cities along the west... More »
Myrtoan Sea Last Updated on 2013-05-13 at 22:26 The Myrtoan Sea (also Mirtoan Sea) is part of the Aegean Sea and the larger Mediterranean Sea. The Myrtoan Sea is bounded by the Cyclades islands to the east and by... More »
Ross Sea Last Updated on 2013-05-05 at 19:12 The Ross Sea is a sea within the Southern Ocean along the perimeter of Antarctica. The coastal zone of the Ross Sea is dominated by the massive Ross Ice... More »
Paleoclimate Last Updated on 2013-04-04 at 14:58 Paleoclimate is the circumstance of much earlier mean meterological condtions, for times prior to instrumental weather measurements. Most discussions of paleoclimate... More »
Aquifer depletion Last Updated on 2013-03-28 at 20:12 Scores of countries are overpumping aquifers as they struggle to satisfy their growing water needs, including each of the big three grain producers—China, India, and the... More »
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