Aaron Mair was the Sierra Club’s 57th president. Mair became a Sierra Club member in 1999, following a decade-long battle that he led to shut down a polluting solid waste incinerator in an inner-city community in Albany, New York. Mair was also a key figure in leading the fight and securing the Sierra Club’s participation in the Clean Up the Hudson campaign, which resulted in a settlement between the EPA and General Electric to dredge toxic PCB’s.