How the world discovered global warming: a timeline

As UN-led climate talks try to agree on new measures to rising stem greenhouse gas emissions, we look at the history of man's discovery that human activity can change the earth's climate

(Reuters) - UN climate talks in Durban, South Africa, from November 28 - December 9 are aimed at agreeing new measures to stem rising emissions of planet-warming greenhouse gases.

Following is a look at how the world discovered global warming and international steps to try to address it:

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