Colorado, failing to meet smog standard, faces tougher limit

By Bruce Finley

The Environmental Protection Agency has dinged Denver and 10 other cities as failing to meet federal smog standards — and Thursday tightened the national limit — driving Colorado back to the drawing board to ensure healthy air.

EPA leaders’ long-delayed decision ratcheting the current 75 parts per billion  ozone limit to 70 ppbfoists even heavier challenges on high-growth metro Denver and other cities exceeding the standards…  Read more….