The American Petroleum Institute released a new study last week challenging the Environmental Protection Agency’s estimates of benefits that new stricter ozone rules will have on the public health.

At a press conference on Thursday (7/28), API hosted Dr. Anne Smith, senior vice president at NERA Economic Consulting, who conducted an analysis of the proposed ozone National Ambient Air Quality Standards, originally scheduled to be issued Friday (7/29).

The U.S. Environmental Protection Agency proposed national standards for oil and gas drilling operations that it said would reduce air pollution, the EPA said in a news release on Thursday (7/28), with the rules targeting the recent boon in drilling across the United States known as hydraulic fracturing.

The new standards are being issued in response to a court order, EPA said. The EPA said the new standards would rely on cost-effective existing technologies to reduce emissions that contribute to smog pollution and can cause cancer while supporting the Obama administration’s priority of continuing to expand safe and responsible domestic oil and gas production.

President Barak Obama on Friday (7/29) announced an agreement with 12 major automakers to increase fuel economy to 54.5 miles per gallon for cars and light-duty trucks by model year 2025, according to news releases issued by both the U.S. Department of Transportation and Environmental Protection Agency.

General Motors, Ford, Chrysler, Toyota, Nissan, Honda, Hyundai, BMW, Volvo, Mazda, Mitsubishi and Jaguar—which together account for more than 90% of all vehicles sold in the U.S.—worked with the administration and the state of California on the new standards.