President Obama Explains How Pollution Affects Our Planet

By Spiral Education 26 Aug 17:57
president obama president barack obama barack obama potus president of the united states obama on DNews science stem white house white house science barack and trace guest host pollution climate change NO2 nitrogen dioxide pollutants chemicals atmosphere oxygen greenhouse greenhouse gases global warming is global warming real air pollution d news dnews education educational discovery news age=14 15 16 17 Trace Dominguez Display all tags
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