Paris climate talks ready to exorcise the ghosts of Copenhagen's failure

Key observers say the chances of failure at the Paris climate talks are diminishing, but red lines still remain between rich and poor countries

We appear to have reached that predictable point in the major Paris climate talks where the idea that the efforts of more than 190 countries will all to come to nothing becomes too enticing for some.

Overnight, stories have emerged of "red lines" being drawn by certain negotiating blocs, particularly around the way richer countries can support poorer countries through cash and collaboration to adapt to climate change.