UN claims 'climate change is undeniable' as Donald Trump threatens to quit Paris climate deal
Donald Trump is expected to withdraw the US from a landmark global climate agreement, a White House official has said, although aides are looking for "caveats in the language" related to the exit and the decision is not yet final.
Abandoning the Paris deal would fulfil a central campaign pledge for the president, but would anger international allies who spent years in difficult negotiations that produced an accord to reduce carbon emissions.
