Learn more about the campaign here: <a href="http://www.portlandcoal.comLetter">http://www.portlandcoal.comLetter</a> toGenOn CEO Edward R. MullerI just signed the following petition addressed to: Edward R. Muller.----------------Close the Portland Generating Station now!GenOn???s coal-fired power plant in Portland, PA poisons our air and water with mercury, sulfur dioxide, and other toxins.