[Big Dave]

The bottom line for the EPA is ambient air quality. They have been measuring that since 1970. Establishing a baseline was the logical base line. The air stunk prior to 1970.

Regs began spewing out and big strides were made in ambient air quality during the 70s but the law of diminishing returns hit them hard and improvements sincw the mid-80s has been marginal. Every improvement since then has been small has come at ever-higher prices.

Literally tens of millions of US jobs have been chased offshore because of enviro-regs, and now we see the most powerful technology available for increasing MPG has been foeclosed.

The EPA is just another agency thay has done what it was put there to do but has now gone rogue to maintain its existence.