Global Clean Energy Within Reach (VIDEO) Stanford University This video is under embargo. Please login to access this video. Caption A new study -- co-authored by Stanford researcher Mark Z. Jacobson and UC-Davis researcher Mark A. Delucchi -- analyzing what is needed to convert the world's energy supplies to clean and sustainable sources says that it can be done with today's technology at costs roughly comparable to conventional energy. But converting will be a massive undertaking on the scale of the moon landings. What is needed most is the societal and political will to make it happen. Credit Mark Shwartz, Stanford University News Service and Woods Institute for the Environment. Usage Restrictions May not be altered or sold. License Licensed content 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.