%V 538 %A L Georgeson %A M Maslin %A M Poessinouw %X Countries need to agree clean energy definitions and baselines to track essential uplift of research investments to decarbonize the world’s energy supplies. %J Nature %N 7623 %I NATURE PUBLISHING GROUP %L discovery10043834 %D 2016 %O This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. %T Clean up energy innovation %P 27-29