On Our Radar: 6 More Coal Plants to Close January 27, 2012, 12:45 pm FirstEnergy says it will retire six older coal-fired power plants in Ohio, Pennsylvania and Maryland by Sept. 1 because of tighter federal rules on emissions. The Akron Beacon Journal Some 3.7 million people in China's southern Guangxi region have been warned to avoid drinking water from a long stretch of two rivers into which a mining company discharged the toxic metal cadmium. Since their trek was interrupted by a legal challenge and then green-lighted by the F.A.A., pilots seeking to guide whooping cranes to their seasonal destination in Florida have had trouble making headway in Alabama. Flying an extra-light plane resembling a bird, a group is trying to teach the endangered birds their migration route from Wisconsin to Florida. Operation Migration New York State officials release a draft report sizing up the potential environmental impact of replacing the aging Tappan Zee Bridge. Public comments will be accepted until March 15. New York State Department of Transportation Automakers express cautious support for California's proposed rules requiring vehicles to emit about 75 percent less pollutants.