Missouri cleans up old sulfur rules that were already revoked
What happened
Missouri's air quality agency asked US environmental regulators to approve a routine paperwork fix: remove references to a sulfur emissions rule that no longer exists. The EPA agreed, which means the state's official air plan now matches what's actually in force.
Why it matters
This is administrative cleanup with no structural change. The rule being removed was already gone; this just updates the state's written air plan to match reality. Nothing about enforcement, monitoring, or actual sulfur emissions limits changed. A curious reader might expect this to be boring, and they would be correct.
The signal
Nothing here signals a measurable change — watch for whether any actual new sulfur emissions limits follow from Missouri in the next year, which would indicate real policy movement rather than paperwork synchronization.