The correct response is all of the above. All the mentioned sources of air pollution—gases from volcanoes, pollen from plants, and smoke from wildfires—are caused by natural processes.
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Question
Which source of air pollution is caused by nature?(1 point)
Responses
gases from volcanoes
gases from volcanoes
pollen from plants
pollen from plants
smoke from wildfires
smoke from wildfires
all of the above
all of the above
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