Prism 2 Reading and Writing Vocab Quiz - Unit 1, 2 and 3
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The burning of fossil fuels is a m______ cause of air pollution. It caused 70% of all air pollution in the U.S. in 2014.
major
Other causes of air pollution, such as smoke from forest fires and volcanoes, are n_________.
natural
Humans are not the only ones who suffer from air pollution. Animal and plant s______ are affected too.
species
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