Supreme Court blocks air pollution rules for power plants via the Chicago Tribune

The decision is a win for Michigan and several other Republican-led states that joined the power industry in challenging the rules.
The so-called “mercury and air toxins” rule has been 25 years in the making. Congress in 1990 strengthened the Clean Air Act and told the EPA to identify the major sources for more than 180 hazardous air pollutants, including mercury and arsenic. And once the agency decided coal and oil-fired power plants were a major source of these pollutants, the EPA was told to adopt regulations that were “appropriate and necessary” to limit these emissions.

Mercury is highly toxic in the air and the water, and it builds up through the food chain. It is particularly dangerous for a pregnant woman and her developing baby. Other toxic pollutants are believed to trigger asthma attacks.

But the rules took far longer than lawmakers had anticipated. The Clinton administration completed the study and prepared the rules, but they were blocked during the George W. Bush administration. Under President Obama, the EPA issued proposed regulations in 2012 that were to take full effect this summer.

The EPA called this a false comparison. The agency said the rules would save 11,000 lives per year. And if all the impact of all the hazardous pollutants were considered, the EPA said the cleaner air would yield public health benefits of more than $37 billion a year.

Last year, a U.S. appeals court here upheld the regulations as justified under the law. But to the surprise of environmentalists, the Supreme Court agreed to hear the legal challenge brought by the affected industries and by Michigan and a coalition of states that rely on coal-fired power plants.

The case of Michigan vs. EPA posed a major test of whether the conservative-leaning high court would uphold the far-reaching regulations of a liberal administration.

An even bigger legal fight lies ahead on whether Obama and the EPA can impose climate-change regulations that would force a 30% reduction in carbon pollution by 2030.

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