president responsable fortighter air pollution

3 answers

harriet Tubman
Of course, Harriet Tubman was not responsible.

However, I am not sure what you mean by "tighter air pollution." Even so, since this is not my area of expertise, I searched Google under the key words "US president "air pollution"" to get these possible sources:

http://en.wikipedia.org/wiki/George_W._Bush
http://www.bloomberg.com/apps/news?pid=10000103&sid=a3D.Znp_wEN0&refer=us
http://alg.umbc.edu/usaq/archives/000752.html
http://www.history.com/states.do?action=detail&state=Air%20and%20Water%20Pollution&contentType=State_Generic&contentId=58538&parentId=earth

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.

I hope this helps. Thanks for asking.
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