A leading British climate scientist has told the BBC he believes the target to limit global warming to 1.5C will be missed.
Professor Sir Bob Watson, former head of the UN climate body, told the BBC’s Today programme he was “pessimistic”.
His warning comes amidst a summer of extreme heat for Europe, China and the US.
The UN says passing the limit will expose millions more people to potentially devastating climate events.
The world agreed to try to limit the temperature increase due to climate change to 1.5C above pre-industrial levels at a UN conference in Paris in 2015. That target has become the centrepiece of global efforts to tackle climate change.