U.S. congress has begun investigating climate scientists whose emails and documents were hacked into to see if their global warming theories have misrepresented the truth behind the cause of climate change.

Investigators have begun studying the 1,079 e-mails and over 3,800 documents that hackers stole last week from the Climate Research Unit (CRU) at East Anglia University in the U.K, Rep. Darrel Issa from California told the Wall Street Journal.

Some of the leaked e-mails and files - which were posted on sites like Wikileaks.org and EastAngliaEmails.com - show growing tensions between scientists and skeptics. Others are mundane announcements of upcoming conferences or research trips.

According to his website, Rep. James Inhofe from Oklahoma said on Monday the leaked correspondence suggested researchers cooked the science to make this thing look as if the science was settled, when all the time of course we knew it was not.

The White House Science Adviser John Holdren has also come under investigation, after one of his emails written in 2003 to Michael Mann of Pennsylvania State University, was hacked.

I'm happy to stand by my contribution to this exchange. I think anybody who reads what I wrote in its entirety will find it a serious and balanced treatment of the question of 'burden of proof' in situations where science germane to public policy is in dispute, Holdren said.

Meanwhile, The University of East Anglia said it will cooperate with police and proceed with its own internal investigation. The University posted a statement calling the disclosure mischievous and saying it is aiding the police in an investigation.

The statement also quotes Jones, CRU's director, explaining his November 1999 e-mail, which said: I've just completed Mike's Nature trick of adding in the real temps to each series for the last 20 years (i.e. from 1981 onwards) and from 1961 for Keith's to hide the decline.

Jones said that the word trick was used colloquially as in a clever thing to do and that it is ludicrous to suggest that it refers to anything untoward.

The leaked data comes just two weeks before the U.N. climate conference in Copenhagen will begin on Dec. 7 -18, when 192 nations will meet to discuss a solution on how to reduce emissions of carbon dioxide and other heat-trapping greenhouse gases worldwide.

Read More on the Hacked Global Email Scandal:

Hacked Emails prove Climate Science debate will not end soon

Confidential Climate Change E-mails hacked ahead of Copenhagen Meeting

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