Earlier this week, the 9th Circuit Court of Appeals rejected challenges to the Federal Implementation Plan EPA promulgated after finding that Arizona’s regional haze State Implementation Plan was inadequate. 
I think that the result is both correct and unsurprising.
However, one part of the opinion – a recitation of black-letter law – caught my eye. In discussing the standard of review, the court noted that the arbitrary and capricious standard is “highly deferential.” No surprise there. … More