Rainbowdash1156 Rainbowdash1156
  • 23-05-2017
  • Health
contestada

High levels of in the atmosphere can cause photochemical smog, which can trigger respiratory problems.

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hayleachaviesh
hayleachaviesh hayleachaviesh
  • 25-05-2017
the right answer is carbon dioxide
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chomperloz11
chomperloz11 chomperloz11
  • 25-06-2018
Photo chemical Smog is a form of air pollution. A main source of air pollution is Carbon Dioxide. Known as Co2, this air comes from cars, burning items, and factories. 
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