Specifically, the report noted that global temperatures were on a downward trend over the past 11 years, that scientists do not necessarily believe that storms will become more frequent or more intense due to global warming, and that the theory that temperatures will cause Greenland ice to rapidly melt has been "greatly diminished." A top Republican senator has ordered an investigation into the Environmental Protection Agency's alleged suppression of a report that questioned the science behind global warming. The 98-page report, co-authored by EPA analyst Alan Carlin, pushed back on the prospect of regulating gases like carbon dioxide as a way to reduce global warming. Carlin's report argued that the information the EPA was using was out of date, and that even as atmospheric carbon dioxide levels have increased, global temperatures have declined. "He came out with the truth. They don't want the truth at the EPA," Sen. James Inhofe, R-Okla, a global warming skeptic saying he's ordered an investigation. "We're going to expose it." The controversy comes after the House of Representatives passed a landmark bill to regulate greenhouse gas emissions, one that Inhofe said will be "dead on arrival" in the Senate despite President Obama's energy adviser voicing confidence in the measure. Reps. James Sensenbrenner, R-Wis., and Darrell Issa, R-Calif., also wrote a letter last week to EPA Administrator Lisa Jackson urging the agency to reopen its comment period on the finding. The EPA has since denied the request. Citing the internal e-mails, the Republican congressmen wrote that the EPA was exhibiting an "agency culture set in a predetermined course." "It documents at least one instance in which the public was denied access to significant scientific literature and raises substantial questions about what additional evidence may have been suppressed," they wrote. In a written statement, Issa said the administration is "actively seeking to withhold new data in order to justify a political conclusion." "I'm sure it was very inconvenient for the EPA to consider a study that contradicted the findings it wanted to reach," Sensenbrenner said in a statement, adding that the "repression" of Carlin's report casts doubt on the entire finding. Carlin said he's concerned that he's seeing "science being decided at the presidential level." "Now Mr. Obama is in effect directly or indirectly saying that CO2 causes global temperatures to rise and that we have to do something about it. ... That's normally a scientific judgment and he's in effect judging what the science says," he said. "We need to look at it harder." The controversy is similar to one under the Bush administration -- only the administration was taking the opposite stance. In that case, scientist James Hansen claimed the administration was trying to keep him from speaking out and calling for reductions in greenhouse gases.