Parts of the world are currently experiencing record-breaking temperatures - this weekend, Death Valley in California reached 53.9 degrees centigrade, and Xinjiang in China recorded the country's hottest ever temperature at 52.2 degrees.

But how much of the recent heat can be attributed to climate change? What can and should we do about it? And where does it leave the target of limiting temperature rises to 1.5 degrees, agreed in Paris in 2015 at the climate change summit Cop 21.

Professor Sir Robert Watson, Director of Strategic Development for the Tyndall Centre for Climate Change Research at the University of East Anglia, and former Chair of the UN's Intergovernmental Panel on Climate Change, tells Today's Amol Rajan that current pledges from global governments aren't going far enough and suggests 'we're on a pathway of at least 2.5 degrees'.