International Energy Agency, Nov. 2016.
https://www.iea.org/newsroom/news/2016/november/world-energy-outlook-2016.html

"As a result of major transformations in the global energy system that take place over the next decades, renewables and natural gas are the big winners in the race to meet energy demand growth until 2040, according to the latest edition of the World Energy Outlook, the International Energy Agency’s flagship publication." Includes a link to the free Executive Summary.