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Clean smell doesn't always mean clean air

Some of the same chemical reactions that occur in the atmosphere as a result of smog and ozone are actually taking place in your house while you are cleaning. A researcher in Drexel's College of Engineering ...

dateOct 29, 2014 in Environment
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NASA image: Smoke and haze over China

Smoke and haze hang over a large portion of eastern China in this image captured by the Aqua satellite on October 29, 2014. China uses the method of "slash and burn" agriculture to rid their fields of leftover ...

dateOct 29, 2014 in Earth Sciences
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Coming up for air

Sometimes you've got to hit bottom to battle your way back up. In 1992, the United Nations cited Mexico City as having the worst air quality in the world, with so much pollution that birds sometimes dropped ...

dateOct 29, 2014 in Environment
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