Public health groups launching campaign to defend EPA climate rules

"We want to ensure that members on the hill and their staff understand the Clean Air Act and its value for public health," Iwanowicz said.

The campaign will focus in part on the healthcare costs associated with high levels of air pollution. "Ozone could have you reaching for the asthma inhaler," Iwanowicz siad. "For those who unfortunately are hospitalized due to an asthma attack, those healthcare costs are pretty tremendous."

The campaign comes as Republicans and some centrist Democrats are mulling legislation to limit EPA's climate authority. In the most recent development on this front, Sen. James Inhofe (R-Okla.) and Rep. Fred Upton (R-Mich.) floated a discussion draft Wednesday night that would permanently preempt EPA's pending climate rules.