UN secretary-general Ban Ki-moon called on nations to have the courage to "grasp" the solutions to climate change in Paris.
With the draft agreement still to be adopted, Mr Ban described it as a "historic document" and a "defining moment in a long journey".
He told the COP21 conference: "The end is in sight. Let us now finish the job. The whole world is watching. Billions of people are relying on your wisdom.
"We must protect the planet that sustains us. For that we need all our hands on deck.
"The solutions to climate change are on the table. They are ours for the taking now. Let us have the courage to grasp them."
George Osborne was warned he could be breaking law with cuts to investment in renewable and green energy
Prime Minister David Cameron has welcomed the final approval on an historic international deal to tackle climate change.
WWF-UK's chief executive, David Nussbaum, writes for ITV News after the release of the final draft of the Paris Agreement on climate change.