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

25-05-2017

the right answer is carbon dioxide

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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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