US top court examines rules on cross-border air pollution
Washington: The US Supreme Court heard arguments on environmental rules aiming to reduce smog that drifts from one state to another.
An appeals court in Washington has blocked the Environmental Protection Agency`s "good neighbour" regulations, saying the agency exceeded its authority, after 14 states and several industry groups appealed.
But nine states and six cities have asked the top court to reverse the appeals court decision and put the regulations into force.
At issue are control measures on emissions of sulfur dioxide and other greenhouse gases which sometimes waft across state boundaries, leaving upwind states in violation of clean air standards.
The government claims this pollution is behind one out of every 20 deaths in the United States and thousands of cases of asthma.
The EPA under the program would make a determination as to whether a given state had "contributed significantly" to the air pollution of a neighbouring state.
If so, the federal agency required that the offending state implement corrective measures, including possibly closing old factories or making sizable investments in emission-reducing technology.
Air pollution "depends on where the wind blows, and that changes all the time," emphasised liberal Justice Stephen Breyer, apparently leaning towards approving the EPA regulations.
But Texas Lawyer Jonathan Mitchell, who also represents 13 other states and Peter Keisler, lawyer for several industry and mining groups, questioned whether the EPA had the authority to impose these costly regulations, and conservative Justice Antonin Scalia seemed to agree.
Justice Samuel Alito recused himself, leaving eight justices to issue a decision, likely in the spring.
The four progressive justices seemed swayed by the government arguments, while the four conservatives seemed more divided in their opinions.
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