Energy/Environment Smog check: EPA proposes tougher regs for ground-level ozone pollution (+video)

Environmental and health advocates welcome a lower level for ozone found in smog. Industry officials say it would mean 'enormous costs' for the US economy and consumers.

By , Staff writer

Lucas Jackson/Reuters/File

In a controversial move that could impact the US economy as well as the health of millions of Americans, the Obama administration wants to tighten ground-level ozone pollution standards.