There's no shortage of criticism that the Climate Change Summit in Glasgow is too much hot air and not enough action.

But some climate analysts are encouraged by what they see as a tangible push for change over the opening days of COP26.

The devil, as always, will be in the detail.

Māni Dunlop speaks to University of Canterbury political scientist and author on the Intergovernmental Panel on Climate Change, Professor Bronwyn Hayward.