1. Natural
Resources and Earth System Science Program, University of New Hampshire, Durham, New Hampshire 03824, United States
2. Department
of Chemistry, Appalachian State University, Boone, North Carolina 28608, United States
3. Department
of Chemistry, Physics and Geoscience, Meredith College, Raleigh, North Carolina 27607, United States
4. Department
of Mechanical Engineering, Penn State Greater Allegheny, McKeesport, Pennsylvania 15132, United States
5. Clean Air Task Force, Boston, Massachusetts 02108, United States
6. Environmental
Science Program, Appalachian State University, Boone, North Carolina 28608, United States