A Commerce Department inspector general investigation into the “Climategate” controversy finds that government scientists at the National Oceanic and Atmospheric Administration did not manipulate climate change data.

It’s the latest investigation to clear scientists of manipulating climate data after thousands of e-mails from the University of East Anglia’s Climate Research Unit were leaked in 2009.

“Climategate” has become something of a rallying call for climate skeptics, who have pointed to the e-mails to suggest there is a conspiracy among the world’s scientists. But a slew of investigations into the e-mails have cleared scientists of any wrongdoing.

“In our review of the CRU emails, we did not find any evidence that NOAA inappropriately manipulated data comprising the [Global Historical Climatology Network] dataset or failed to adhere to appropriate peer review procedures,” said the report, which was authored by Commerce Department Inspector General Todd Zinser at the request of Sen. James Inhofe (R-Okla.).

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