UN climate negotiators bickered in Doha on Monday over cash and commitments needed to curb Earth-warming greenhouse gases, even as fresh alarm bells were rung about the perils the planet faces.

Halfway through 11-day talks, nearly 200 nations remained far apart on issues vital for unlocking a global deal on climate change, said delegates at the talks in Qatar's capital.

Poor countries were insisting Western nations sign up to deeper, more urgent cuts in carbon emissions under the Kyoto Protocol after the pact's first round of pledges expires at year's end.

They were also demanding the rich world commit to a new funding package from 2013 to help them cope with worsening drought, flood, storms and rising seas.

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