The biggest air pollution threat to poor people is ____. a. smoke from burning forests b. dust blown into the air c. indoor air pollution d. badly maintained automobiles e. pollutants from industry

The biggest air pollution threat to poor people is ____.

a. smoke from burning forests

b. dust blown into the air

c. indoor air pollution

d. badly maintained automobiles

e. pollutants from industry

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The biggest air pollution threat to poor people is ____. a. smoke from burning forests b. dust blown into the air c. indoor air pollution d. badly maintained automobiles e. poll…

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