Geographical Articles

• Near-Earth Object Impacts
  Earth Science
  Natural Disasters
  Forest
  Atmosphere
  Earthquakes
   
  

  Tunguska event

  The Tunguska event was an explosion that occurred at 60 degrees 55'N 101degrees 57'E, near the Podkamennaya (Under Rock) Tunguska River, in what is now Evenk Autonomous Okrug, at 7:17 AM on June 30, ... > more
• Energy and the Environment
  Renewable Energy
  Environmental Science
  Fuel Cells
  Sustainability
  Alternative Fuels
   
  

  Liquid nitrogen economy

  A liquid nitrogen economy is a hypothetical proposal for a future economy in which the primary form of energy storage and transport is liquid nitrogen. It is proposed as an alternative to liquid ... > more
• Tornadoes
  Severe Weather
  Floods
  Renewable Energy
  Wildfires
  Weather
   
  

  Fujita scale

  The Fujita scale (F-Scale), or Fujita-Pearson scale, rates a tornado's intensity by the damage it inflicts on human-built structures and sometimes on ... > more
• Energy and the Environment
  Wind Energy
  Electricity
  Sustainability
  Water
  Nature of Water
   
  

  Water turbine

  A water turbine is a rotary engine that takes energy from moving water. Water turbines were developed in the nineteenth century and were widely used for industrial power prior to electrical grids. ... > more
• Air Pollution
  Air Quality
  Atmosphere
  Pollution
  Environmental Science
  Environmental Issues
   
  

  Inversion (meteorology)

  A temperature inversion is a meteorological phenomenon in which air temperature increases with height for some distance above the ground, as opposed to the normal decrease in temperature with height. ... > more
• Environmental Issues
  Pollution
  Air Pollution
  Global Warming
  Atmosphere
  Earth Science
   
  

  Coriolis effect

  The Coriolis effect caused by the rotation of the Earth is responsible for the precession of a Foucault pendulum and for the direction of rotation of cyclones. In general, the effect deflects objects ... > more
• Fish
  Fisheries
  Marine Biology
  Sea Life
  Wild Animals
  Zoology
   
  

  Fish

  Fish are aquatic vertebrates that are typically cold blooded, covered with scales, and equipped with two sets of paired fins and several unpaired fins. Fish are abundant in the sea and in ... > more
• Nature of Water
  Acid Rain
  Organic Chemistry
  Sports Science
  Chemistry
  Air Quality
   
  

  Phosphorus

  Phosphorus is the chemical element in the periodic table that has the symbol P and atomic number 15. Phosphorus is commonly found in inorganic phosphate rocks and in all living cells. The most ... > more
• Genetically Modified
  Biotechnology
  Genes
  Biochemistry Research
  Gene Therapy
  Genetics
   
  

  Genetically modified organism

  A genetically modified organism (GMO) is an organism whose genetic material has been altered using techniques in genetics generally known as recombinant DNA technology. Recombinant DNA technology is ... > more
• Air Quality
  Air Pollution
  Pollution
  Petroleum
  Environmental Science
  Vehicles
   

  Automobile emissions control

  Automobile emissions control covers all the technologies that are employed to reduce the air pollution-causing emissions produced by ... > more

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