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• Tornadoes
  Severe Weather
  Climate
  Natural Disasters
  Weather
  Storms
   
  

  May 2003 Tornado Outbreak Sequence

  The May 2003 Tornado Outbreak Sequence in the United States was a series of tornado outbreaks that occurred from May 3 to May 11, 2003. There were 401 tornado reports in 19 states, 1,587 reports of ... > more
• Weather
  Severe Weather
  Geomagnetic Storms
  Hurricanes and Cyclones
  Storms
  Global Warming
   
  

  Weather

  Weather is a term that encompasses phenomena in the atmosphere of a planet. The term is normally taken to mean the activity of these phenomena over short periods of time, usually no more than a few ... > more
• Desert
  Geography
  Floods
  Oceanography
  Renewable Energy
  Earth Science
   
  

  Dune

  In physical geography, a dune is a hill of sand built by eolian processes. Bare dunes are subject to shifting location and size based on their interaction with the wind. The "valley" or trough ... > more
• Air Quality
  Air Pollution
  Pollution
  Natural Disasters
  Environmental Science
  Tsunamis
   

  List of disasters

  This is a list of world disasters, both natural and man-made. A disaster is a natural or man-made event that negatively affects life, property, livelihood or industry, often resulting in permanent ... > more
• Global Warming
  Geochemistry
  Air Quality
  Forest
  Climate
  Earth Science
   
  

  Carbon cycle

  The carbon cycle is the biogeochemical cycle by which carbon is exchanged between the biosphere, geosphere, hydrosphere and atmosphere of the Earth. The cycle is usually thought of as four major ... > more
• Oceanography
  Water
  Floods
  Geography
  Global Warming
  Desert
   
  

  Sediment

  Sediment is any particulate matter that can be transported by fluid flow and which eventually is deposited as a layer of solid particles on the bed or bottom of a body of water or other liquid. ... > more
• Geography
  Weather
  Severe Weather
  Climate
  Earth Science
  Global Warming
   
  

  Monsoon

  A monsoon is a periodic wind, especially in the Indian Ocean and southern Asia. The word is also used to label the season in which this wind blows from the southwest in India and adjacent areas that ... > more
• Ozone Holes
  Environmental Issues
  Air Quality
  Air Pollution
  Pollution
  Atmosphere
   
  

  Ozone

  Ozone (O3) is an allotrope of oxygen, the molecule consisting of three oxygen atoms instead of the more stable diatomic O2. Ozone is a powerful oxidizing agent. It is present in low concentrations ... > more
• Infant's Health
  Agriculture and Food
  Organic
  Sports Medicine
  Healthy Aging
  Attention Deficit Disorder
   
  

  Pesticide

  The Environmental Protection Agency (EPA or USEPA) defines a pesticide as "any substance or mixture of substances intended for preventing, destroying, repelling, or mitigating any pest". A pesticide ... > more
• Weather
  Climate
  Global Warming
  Environmental Issues
  Severe Weather
  Earth Science
   

  Climate model

  Climate models use quantitative methods to simulate the interactions of the atmosphere, oceans, land surface, and ice. They are used for a variety of purposes from study of the dynamics of the ... > more

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