The future of the fight against climate change dominated discussions at the two week conference convening 2,000 diplomats and, in its closing days, a clutch of environment ministers.

The agreement came after marathon talks that continued until Saturday morning, a day after the official close of the conference.

In May, international experts will take a first stab at discussing options for strengthening the fight against the greenhouse effect in the next decade. The meeting has been billed a "seminar" to underline that no decision will be taken.

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