Air Quality Articles

• Geology
  Fossils
  Earth Science
  Origin of Life
  Earthquakes
  Early Climate
   
  

  Precambrian

  The Precambrian is an informal name for the eons of the geologic timescale that came before the current Phanerozoic eon. It spans from the formation of Earth around 4500 Ma (million years ago) to the ... > more
• Tsunamis
  Natural Disasters
  Earthquakes
  Geography
  Earth Science
  Severe Weather
   
  

  2004 Indian Ocean earthquake

  The 2004 Indian Ocean earthquake, known by the scientific community as the Sumatra-Andaman earthquake, was an undersea earthquake that occurred at 00:58:53 UTC (07:58:53 local time) on December 26, ... > more
• Hurricanes and Cyclones
  Severe Weather
  Weather
  Oil Spills
  Climate
  Natural Disasters
   
  

  List of Category 5 Atlantic hurricanes

  This is a list of all Atlantic hurricanes that have reached Category 5, the highest classification of tropical cyclone intensity on the Saffir-Simpson Hurricane ... > more
• Endangered Plants
  Agriculture and Food
  Botany
  Genetics
  Food and Agriculture
  Nature
   
  

  Plant breeding

  Plant breeding is the purposeful manipulation of plant species in order to create desired genotypes and phenotypes for specific purposes. This manipulation involves either controlled pollination, ... > 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
• Civil Engineering
  Geology
  Earthquakes
  Engineering
  Engineering and Construction
  Natural Disasters
   

  Engineering geology

  Engineering Geology is the application of the science of geology to the understanding of geologic phenomena and the engineering solution of geologic hazards and other geologic problems for ... > more
• Exotic Species
  Nature
  Ecology
  Invasive Species
  Ecology Research
  New Species
   
  

  Invasive species

  Invasive species is a phrase with several definitions. The first definition expresses the phrase in terms of non-indigenous species (e.g. plants or animals) that adversely effect the habitats they ... > more
• Endangered Plants
  Nature
  Botany
  Cloning
  Biotechnology and Bioengineering
  Genetically Modified
   

  Transgenic plants

  Transgenic plants are plants that have been genetically engineered, a breeding approach that uses recombinant DNA techniques to create plants with new characteristics.They are identified as a class ... > more
• Endangered Plants
  Botany
  Nature
  Pests and Parasites
  Seeds
  Rainforests
   
  

  Plant

  Plants are a major group of living things including familiar organisms such as trees, flowers, herbs, ferns, and mosses. About 350,000 species of plants, defined as seed plants, bryophytes, ferns and ... > more
• Alternative Fuels
  Fossil Fuels
  Energy and Resources
  Fuel Cells
  Energy and the Environment
  Petroleum
   
  

  Common ethanol fuel mixtures

  Ethanol (ethyl alcohol) and methanol (methyl alcohol) are two types of alcohol fuels. The use of pure alcohols in internal combustion engines is only possible if the engine is designed or modified ... > more

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