The U.S. Environmental Protection Agency (EPA) denied 10 petitions challenging its 2009 determination that climate change is real, is occurring due to emissions of greenhouse gases from human activities, and threatens human health and the environment.

 “The endangerment finding is based on years of science from the U.S. and around the world. These petitions — based as they are on selectively edited, out-of-context data and a manufactured controversy — provide no evidence to undermine our determination. Excess greenhouse gases are a threat to our health and welfare,” said EPA Administrator Lisa P. Jackson. “Defenders of the status quo will try to slow our efforts to get America running on clean energy. A better solution would be to join the vast majority of the American people who want to see more green jobs, more clean energy innovation and an end to the oil addiction that pollutes our planet and jeopardizes our national security.”

The basic assertions by the petitioners and EPA responses follow.
Claim: Petitioners say that emails disclosed from the University of East Anglia’s Climatic Research Unit provide evidence of a conspiracy to manipulate global temperature data.
Response: EPA reviewed every e-mail and found this was simply a candid discussion of scientists working through issues that arise in compiling and presenting large complex data sets. Four other independent reviews came to similar conclusions.

Claim: Petitioners say that errors in the IPCC Fourth Assessment Report call the entire body of work into question.
Response: Of the alleged errors, EPA confirmed only two in a 3,000 page report. The first pertains to the rate of Himalayan glacier melt and second to the percentage of the Netherlands below sea level. IPCC issued correction statements for both of these errors. The errors have no bearing on Administrator Jackson’s decision. None of the errors undermines the basic facts that the climate is changing in ways that threaten our health and welfare.

Claim: Petitioners say that because certain studies were not included in the IPCC Fourth Assessment Report, the IPCC itself is biased and cannot be trusted as a source of reliable information.
Response: These claims are incorrect. In fact, the studies in question were included in the IPCC report, which provided a comprehensive and balanced discussion of climate science.

Claim: Petitioners say that new scientific studies refute evidence supporting the Endangerment Finding.
Response: Petitioners misinterpreted the results of these studies. Contrary to their claims, many of the papers they submit as evidence are consistent with EPA’s Finding. Other studies submitted by the petitioners were based on unsound methodologies. Detailed discussion of these issues may be found in volume one of the response to petition documents, on EPA’s website.

Information on EPA’s findings and the petitions: http://epa.gov/climatechange/endangerment/petitions.html

Texas, Virginia and others are suing to overturn EPA’s “endangerment finding” in federal appeals court, but that case sits on hold pending Jackson’s decision to address the  preliminary requests for the agency to reconsider its decision. Oral arguments in the lawsuit are unlikely until next spring, with a final decision expected by the summer, according to lawyers tracking the case in recent media reports.

Additionally, a House Appropriations subcommittee last week rejected an amendment to EPA’s annual spending bill to put a two-year hold on EPA’s climate rules for power plants, according to media reports. Similar proposals are also trying to gain traction on other bills.

It is believed that President Barack Obama would most likely veto any bill that reached his desk to stop the EPA from regulating greenhouse