Toronto Star: Ontario plans to shut down four coal-fuelled power units in late 2010, a move environmentalists say will make the province a leader in the fight against climate change. Nanticoke generating station, near Simcoe, will see two of eight units closed and at the Lambton plant near Sarnia, two of four units will close by October next year. “As an asthmatic and former health minister I have come to understand this is not just a matter of the energy supply mix but of a matter of …