Missouri quietly removes old pollution rules for power plants that already closed
What happened
Missouri is updating its air pollution rules for sulfur dioxide. The state is removing outdated requirements for power plants that have either shut down or switched to cleaner fuels. This change does not make pollution rules stricter or looser overall.
Why it matters
States regularly update their environmental plans to reflect changes in local industry. This document shows how a state cleans up its books after power plants close or change fuel sources. It also shows how environmental regulators ensure that these administrative updates do not weaken overall air quality standards.
The signal
Watch for similar administrative updates in other states as more coal plants close or convert to natural gas.