Environmental Issue Articles

• Extinction
  Endangered Animals
  Endangered Plants
  New Species
  Nature
  Exotic Species
   
  

  Extinction

  In biology and ecology, extinction is the cessation of existence of a species or group of taxa, reducing biodiversity. The moment of extinction is generally considered to be the death of the last ... > more
• Soil Types
  Organic
  Fungus
  Acid Rain
  Landslides
  Agriculture and Food
   
  

  Soil

  Soil is material capable of supporting plant life. Soil forms through a variety of soil formation processes, and includes weathered rock "parent material" combined with dead and living organic matter ... > more
• Earth Science
  Geology
  Earthquakes
  Environmental Issues
  Climate
  Oceanography
   
  

  Earth science

  Many scientists are now starting to use an approach known as Earth system science which treats the entire Earth as a system in its own right, which evolves as a result of positive and negative ... > more
• Air Quality
  Environmental Science
  Air Pollution
  Pollution
  Environmental Issues
  Thermodynamics
   
  

  Air conditioning

  An air conditioner (AC or air-con) is an appliance or mechanism designed to extract heat from an area using a refrigeration cycle. In construction, a complete system of heating, ventilation and air ... > more
• Ice Ages
  Global Warming
  Early Climate
  Climate
  Snow and Avalanches
  Geography
   
  

  Little Ice Age

  The Little Ice Age (LIA) was a period of cooling lasting approximately from the 14th to the mid-19th centuries, although there is no generally agreed start or end date: some confine the period to ... > 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
• Severe Weather
  Storms
  Water
  Climate
  Global Warming
  Environmental Issues
   
  

  Cloud

  A cloud is a visible mass of condensed droplets or frozen crystals suspended in the atmosphere above the surface of the Earth or another planetary body. Clouds form when the invisible water vapor in ... > more
• Recycling and Waste
  Hazardous Waste
  Environmental Science
  Environmental Issues
  Earth Science
  Grassland
   

  Activated sludge

  Activated sludge is a process in sewage treatment in which air or oxygen is forced into sewage liquor to develop a biological floc which reduces the organic content of the ... > more
• Hazardous Waste
  Petroleum
  Pollution
  Water
  Oil Spills
  Energy and the Environment
   
  

  Methyl tert-butyl ether

  MTBE (methyl tertiary-butyl ether) is a chemical compound that is manufactured by the chemical reaction of methanol and isobutylene. MTBE is produced in very large quantities (more than 200,000 ... > more
• Biodiversity
  Ecology
  Ecology Research
  Nature
  Extinction
  Endangered Plants
   
  

  Biodiversity

  Biodiversity or biological diversity is the diversity of life. There are a number of definitions and measures of biodiversity. Biodiversity is commonly identified at three levels. First there is ... > more

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