PennEnvironment
|
Philadelphia Daily News
By
Michelle Greenblatt

This summer's higher temperatures have brought more orange alert days for smog pollution. But as bad as this summer has been, imagine how much worse it will get if we don't act now to reduce smog. Could you imagine it being so polluted you couldn't go outside?

For more information click on the link below:

http://articles.philly.com/2011-08-06/news/29858986_1_public-library-president-obama-free-access