The UN Climate Conference in Glasgow is being described as a make-or-break moment for humanity. The purpose of the gathering is to implement the 2015 Paris Agreement, which aims to limit global warming to 1.5 degrees Celsius above pre-industrial times. Currently the world is way off target, with temperatures still projected to rise higher than is sustainable.

A big part of the problem is the huge cost involved. Developed countries have confirmed they have failed to meet a pledge made in 2009 to provide $100 billion a year in climate finance by 2020. Developing countries say the money is needed now. They require defences to protect their populations from the growing effects of climate change, and to move away from carbon energy and towards renewable sources.

So what is climate finance, what's been promised and will it be be delivered? Join Ritula Shah and a panel of expert guests from the UN summit in Glasgow as they discuss who pays to fix climate change.