ERROR 1
ERROR 1
ERROR 2
ERROR 2
ERROR 2
ERROR 2
ERROR 2
Password and Confirm password must match.
If you have an ACS member number, please enter it here so we can link this account to your membership. (optional)
ERROR 2
ACS values your privacy. By submitting your information, you are gaining access to C&EN and subscribing to our weekly newsletter. We use the information you provide to make your reading experience better, and we will never sell your data to third party members.
An EPA advisory panel is urging the agency to lower the nationwide limit on ground-level ozone, the main component of smog, to somewhere between 60 and 70 ppb. In 2008, the Bush Administration lowered the standard from 84 to 75 ppb. In a letter to EPA Administrator Lisa P. Jackson, the members of the Clean Air Scientific Advisory Committee say they have determined that “the evidence from controlled human and epidemiological studies strongly supports the selection of a new primary ozone standard within the 60–70 ppb range for an 8-hour averaging time.” EPA has said it plans to issue a revised standard in July that is within the range the scientific panel has recommended. Industry groups contend that the most recent research does not justify setting a more stringent ozone standard. But the advisory group says studies have found that some healthy adults experience breathing problems when exposed to ozone even at concentrations as low as 60 ppb. EPA’s projections indicate that most areas of the U.S. with air pollution monitors would fail to meet a tighter ozone standard, creating another regulatory hurdle for industrial facilities.
Join the conversation
Contact the reporter
Submit a Letter to the Editor for publication
Engage with us on X