1. Duke Energy Distinguished Professor, Global Institute for Energy and Environmental Systems (GIEES), Univ. of North Carolina at Charlotte, CARC 238, Charlotte, NC 28223-0001 (corresponding author).
2. Formerly Graduate Student, GIEES, Univ. of North Carolina at Charlotte, Charlotte, NC 28223-0001.
3. Post-Doctoral Researcher, Environmental Science, Spelman College, Atlanta, GA, 30315.