Detroit must now clean its air again after a court reversed regulators

Detroit's air quality status just got worse, officially. US environmental regulators must now classify the area as failing to meet ozone standards, triggering stricter pollution controls for local businesses and governments.

Detroit had a brief reprieve from strict air pollution rules. That is over. Local governments and businesses in the area will now face tighter restrictions on emissions and will need to develop new plans to reduce ozone. This shows that court challenges can force US environmental regulators to reverse their decisions, even after they have been made.