Yale Environment 360: Gregory H. Boyce, the CEO and Chairman of Peabody Energy the worlds largest private coal company is facing his share of troubles. President Obama is planning to regulate greenhouse gas emissions from coal plants. The natural gas boom in the U.S. has cut into coals traditional dominance of the electric power sector. Public opposition has helped kill scores of proposed coal-fired power plants in the U.S., and the coal industrys plans to build terminals in the Pacific Northwest to export coal...