Indiana power plants can keep polluting at higher levels for longer

The US environmental regulators are adjusting the pollution limits for Indiana power plants. This means some coal-fired power plants that were supposed to retire can now stay open and emit more nitrogen oxides.

The US environmental regulators had previously set pollution limits based on power companies' plans to shut down old, dirty plants. Now, some of those companies have changed their minds, and the regulators are letting them keep polluting at higher levels. This decision means that air quality in downwind states will not improve as much as expected, and the cost of reducing emissions will fall more heavily on other power plants or industries.