Graph: Annual Global Temperature over Land and Ocean (image) University of Waterloo Share Print E-Mail Caption Chlorofluorocarbons are to blame for global warming since the 1970s and not carbon dioxide, according to new research from the University of Waterloo published in the International Journal of Modern Physics B this week. This graph shows the predicted path of global temperatures is set to continue their decline as a result of depletion of CFC's in the atmosphere. Credit Qing-Bin Lu, University of Waterloo Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.