Industrial plants in two Pennsylvania counties must now cut sulfur pollution
What happened
The US environmental regulators just declared parts of two Pennsylvania counties officially "nonattainment" for sulfur dioxide pollution. This means industrial facilities in those areas will face stricter rules and may need to invest in new pollution controls.
Why it matters
These areas were previously considered clean or unclassified for sulfur dioxide. The official designation means the state must create a plan to reduce pollution. Local industries must comply. This shifts the cost of pollution from public health to industrial operations.
The signal
Watch for the Pennsylvania Department of Environmental Protection to release its plan for reducing sulfur dioxide emissions in these counties.