New York Times: Mayor Richard M. Daley has repeatedly billed himself as a green mayor and recently vowed to use "every available tool" to reduce the city’s carbon footprint, but critics say City Hall has failed to grapple with Chicago’s two most significant sources of greenhouse-gas pollution. For the past decade, public health and environmental advocates have been trying to force Midwest Generation L.L.C. to reduce emissions from its aging Fisk and Crawford coal-burning power plants in the Pilsen …