This report from the Clear the Air--a joint project of the Clean Air Task Force, National Environmental Trust, and U.S. PIRG Education Fund--looks at emissions data, health impacts and the power to clean up the toxins in our air. This report was made possible with funding from The Pew Charitable Trusts. The opinions expressed in this report are those of the author and do not necessarily reflect the views of The Pew Charitable Trusts.