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• Alternative Fuels
  Energy and the Environment
  Renewable Energy
  Fuel Cells
  Energy Technology
  Petroleum
   
  

  Ethanol fuel

  The use of ethanol as a fuel for internal combustion engines, either alone or in combination with other fuels, has been given much attention mostly because of its possible environmental and long-term ... > more
• Air Pollution
  Air Quality
  Pollution
  Environmental Science
  Environmental Issues
  Sports Science
   
  

  Smog

  Smog is a kind of air pollution, originally named for the mixture of smoke and fog in the air. Classic smog results from large amounts of coal burning in an area and is caused by a mixture of smoke ... > more
• Oceanography
  Floods
  Geography
  Landslides
  Global Warming
  Ecology
   
  

  Coast

  The coast is defined as the part of the land adjoining or near the ocean. A coastline is properly, a line on a map indicating the disposition of a coast but the word is often used to refer to the ... > more
• Air Pollution
  Acid Rain
  Geochemistry
  Organic Chemistry
  Air Quality
  Healthy Aging
   

  Nitrogen oxide

  NOx is a generic term for the various nitrogen oxides produced during combustion. They are believed to aggravate asthmatic conditions, react with the oxygen in the air to produce ozone, which is also ... > more
• Marine Biology
  Oceanography
  Fish
  Geography
  Fisheries
  Extinction
   
  

  Dead zone (ecology)

  Dead zones are hypoxic (low-oxygen) areas in the world's oceans, the observed incidences of which have been increasing since oceanographers began noting them in the 1970s. The term could as well ... > more
• Healthy Aging
  Attention Deficit Disorder
  Sports Medicine
  Infectious Diseases
  Viruses
  Allergy
   

  Typhoid fever

  Typhoid fever (a.k.a. Enteric fever) is an illness caused by the bacterium Salmonella typhi. Very common worldwide, it is transmitted by ingestion of food or water contaminated with feces from an ... > 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
• Energy and the Environment
  Alternative Fuels
  Renewable Energy
  Fuel Cells
  Batteries
  Fossil Fuels
   
  

  Fuel cell

  A fuel cell is an electrochemical device similar to a battery, but differing from the latter in that it is designed for continuous replenishment of the reactants consumed; i.e. it produces ... > more
• Infant's Health
  Healthy Aging
  Attention Deficit Disorder
  Food
  Sports Medicine
  Air Quality
   
  

  Pesticide poisoning

  Pesticide poisonings, where chemicals intended to control a pest affect non-target organisms such as humans, wildlife, or bees. Since label directions required by the FIFRA are specifically designed ... > more
• Healthy Aging
  Attention Deficit Disorder
  Food Additives
  Sports Science
  Sports Medicine
  Chemistry
   
  

  Chlorine

  Chlorine is the chemical element with atomic number 17 and symbol Cl. It is a halogen, found in the periodic table in group 17. As the chloride ion, which is part of common salt and other compounds, ... > more

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