The EPA was told to actually consider costs of their air pollution rules before implementing them unilaterally. Wait, costs weren’t considered  by the EPA before it was enacted? Wow.
“The Supreme Court ruled 5-4 against Environmental Protection Agency pollution rules for power plants Monday, in a blow to President Obama’s environmental agenda.”
“The majority decision, written by Justice Antonin Scalia, said the EPA has to consider the costs of complying with the rules and sent the air pollution regulations back to the agency.”
“The EPA rules in question regulate hazardous air pollutants and mercury from coal- and oil-fired power plants, known as the MATS regulations. The regulations went into effect April 16. The utility industry had argued that the rules cost them billions of dollars to comply and that EPA ignored the cost issue in putting the regulations into effect.”