BBC: Tom Burke is the Chairman of the Climate Diplomacy Think Tank E3G. He believes the world is witnessing a moment of history.

Tom Burke: I think what’s really important, much more than the specifics of the text is the direction of travel is outlines. It now makes it really clear that we are at a turning point, we are moving away from a world that depended on high-carbon energy for its energy supply, and it is now moving, and is going to move further and faster than anybody would have thought of before this agreement, towards a low-carbon economy, based on energy efficiency and more use of renewables. So I’m quite positive about where we have got to.