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Day 16 18 breaths - PowerPoint PPT Presentation

15 -4 The Air We Breathe

15 -4 The Air We Breathe. Air Quality is determined by the amount and type of pollutants in the air. Natural sources produce a greater amount of pollutants than humans do. Human activities cause most of the air pollution in cities. This pollution may be solid, liquid, or gas.

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Day 16 18 breaths - PowerPoint PPT Presentation

15 -4 The Air We Breathe