Obama vows to back EPA

Obama was visiting the Washington headquarters of an agency that has been a frequent target of criticism from Republicans in Congress and the candidates seeking to challenge him in November.

"We don't have to choose between dirty air and dirty water, and a growing economy," Obama told the EPA staff. He vowed to "stand with you every inch of the way."

The president said that, before the EPA was created by President Richard Nixon in 1970, some waterways were heavily polluted and cars were emitting lead pollution into the air.

"You almost want to do a 'Back to the Future' kind of reminder of folks of what happens when we didn't have a strong EPA," Obama said.

Heather Taylor-Miesle, director of the Natural Resources Defense Council Action Fund, an advocacy group, wrote in a blog posting that Obama's visit is meant to "present a clear contrast" to Republican candidates.

Still, Obama has drawn some criticism from environmentalists. On Sept. 2, he sided with Republicans and business leaders in canceling the EPA's proposed tighter rules on ozone. That put him at odds with EPA Administrator Lisa Jackson.

He said the decision was influenced by his consideration of "reducing regulatory burdens and regulatory uncertainty, particularly as our economy continues to recover." The higher ozone standards would have cost $19 billion to $90 billion, according to the White House.

Obama's decision means that states and counties must comply with an ozone standard of 75 parts per billion set by President George W. Bush's administration. A scientific advisory panel had said a limit of 60 to 70 parts per billion was necessary to protect public health and Jackson had proposed cutting the level to 70 parts per billion.