ESA Euronews: Global warming - the big picture

Our planet is warming up. But to what degree will the climate change in the future? In order to find out, scientists are focussing on 50 'Essential Climate Variables'. Each piece is needed to better understand the big picture - it is a bit like trying to solve a massive scientific puzzle. Euronews speaks to world-renowned climate change experts to try to put together the pieces of the jigsaw.