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Latest Jenny Klingberg Stories

2011-06-30 18:21:45

Ground-level ozone is an air pollutant that harms humans and plants.


Word of the Day
aphotic
  • Having no light.
  • Of or relating to the region of a body of water that is not reached by sunlight and in which photosynthesis is unable to occur.
The word 'aphotic' comes from Greek roots meaning 'without' and 'light'.
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