The Nanticoke Generating Station is the largest coal-fired power plant in North America, delivering up to 2,760 MW of power from its base in Nanticoke, Ontario, Canada. It is owned by Ontario Power Generation, a crown corporation of the Government of Ontario. It was scheduled for decommission in early 2009 as part of the Ontario commitment to eliminate coal power, but this has been repeatedly delayed. The plant has shut down four of its eight units, and is currently scheduled to phase out its use of coal by 2014, switching to biomass or natural gas. Nanticoke is one of Canada's top ten single sources of greenhouse gases. It is also Ontario's single largest source of nitrogen oxides and mercury that cause smog, as well as other deadly pollutants. The Ontario Medical Association has called air pollution "a public health crisis" that is killing over 5,900 people a year in Ontario.