CNN wrote:Short-term exposure to smog, or ozone, is clearly linked to premature deaths that should be taken into account when measuring the health benefits of reducing air pollution, a National Academy of Sciences review concludes.

The findings contradict arguments made by some White House officials that the connection between smog and premature death has not been shown sufficiently and that the number of saved lives should not be calculated in determining clean air benefits.

The report released Tuesday by a panel of the Academy's National Research Council says government agencies "should give little or no weight" to such arguments.

"The committee has concluded from its review of health-based evidence that short-term exposure to ambient ozone is likely to contribute to premature deaths," the 13-member panel said.

It added that "studies have yielded strong evidence that short-term exposure to ozone can exacerbate lung conditions, causing illness and hospitalization and can potentially lead to death."