Yesterday, EPA finalized a rule lowering the primary annual National Ambient Air Quality Standard for PM2.5 to 9.00 ug/m3. This is a significant reduction from the current 12.00 ug/m3 standard and a victory for environmentalists, even though they had advocated for larger reduction.
There is substantial evidence supporting the reduction, both in the legal and the common sense understanding of this term. The evidence in support of a lower standard has been piling up for some time. … More