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GOP accused of holding public health hostage with EPA rider

"These are not political issues; these are science-based issues," added Donald Hoppert, director of government relations for the American Public Health Association. "EPA scientific findings should not be overturned by Congress."

In response to Republican concerns that environmental regulations are hurting the economy and costing jobs, Hoppert said EPA data show that the Clean Air Act in 2010 prevented more than 160,000 cases of premature mortality, 130,000 heart attacks and millions of lost workdays.

The two officials also said they're gearing up for a fight over the 2012 budget as well. 

And they vowed to continue to reach out to the four Senate Democrats who voted Wednesday in favor of a Republican amendment to permanently prevent the EPA from regulating greenhouse gas emissions: Sens. Mary LandrieuMary Loretta LandrieuProject Veritas at risk of losing fundraising license in New York, AG warns You want to recall John McCain? Good luck, it will be impossible CNN producer on new O'Keefe video: Voters are 'stupid,' Trump is 'crazy' MORE (La.), Joe ManchinJoseph (Joe) ManchinPavlich: The claim Trump let the mentally ill get guns is a lie Toomey to introduce bill broadening background checks for firearms Scott Walker backs West Virginia attorney general in GOP Senate primary MORE (W.Va.), Mark PryorMark Lunsford PryorMedicaid rollback looms for GOP senators in 2020 Cotton pitches anti-Democrat message to SC delegation Ex-Sen. Kay Hagan joins lobby firm MORE (Ark.) and Ben Nelson (Neb.). The amendment failed.