Activists stand on melting blocks of ice with nooses outside the COP25 climate talks in Madrid, Spain [Manu Fernandez/AP]

After two weeks of talks on tackling catastrophic climate change, nations have little progress to show for it.

Negotiators from almost 200 nations gathered for a final time at the United Nations climate meeting in Madrid early Sunday to pass declarations calling for greater ambition in cutting planet-heating greenhouse gases, and in helping poor countries who are suffering the effects of climate change.

But one of the key issues at the talks – an agreement on international carbon markets – has eluded officials even after the Chilean chair extended Friday’s talks deadline to allow more time for negotiations.

The discussions have been accompanied at

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