Citizens and groups can purchase sulfur dioxide emissions allowances alongside electric utilities and other producers of air pollution in annual auctions conducted by the U.S. Environmental Protection Agency (EPA) and on the Chicago Board of Trade [REF].
Examination of EPA Auction results 1993-2013 indicates groups or individuals like A.R.R.F. who purchased emissions allowances for purposes other than releasing air pollution now own the right to emit 3,188 tons per year [REF].