A leading climate change expert from Exeter University has spoken out against President Trump's decision to pull the US out of the Paris Climate Change Accord. .
He says it's bad for American workers and puts US companies at a competitive disadvantage.
Professor of Climate System Dynamics Peter Cox has described it as bad news for the world but even worse news for the US.
He says it can't be allowed to stop progress towards a more sustainable world, but means the US may be left behind