WASHINGTON -- The Supreme Court entered the debate over global warming Monday, agreeing to rule on whether emissions from new cars, trucks and power plants must be further regulated to slow climate change, according to the Los Angeles Times. Twelve states and a coalition of environmentalists have been urging the court to take action, over the objection of the Bush administration. The case will be heard in the fall and could be one of the most important environmental disputes to come before the court, according to the L.A. Times. The Clean Air Act passed by Congress in 1970 required the government to regulate “any air pollutant” from motor vehicles or power plants that may well “endanger public health or welfare,” including by affecting the “weather” or “climate.” A spokeswoman for the EPA said the agency had made the right decision by relying on voluntary moves by manufacturers, but environmental advocates say automakers could be forced to produce a fleet of vehicles that pollute less.