Trump begins year-long process to formally exit Paris climate agreement

• Exit will not be final until day after 2020 elections
• France and China to sign pact on 'irreversibility' of climate accord

Donald Trump is moving to formally exit the Paris climate agreement, making the United States the only country in the world that will not participate in the pact, as global temperatures are set to rise 3C and worsening extreme weather will drive millions into poverty.

The paperwork sent by the US government to withdraw begins a one-year process for exiting the deal agreed to at the UN climate change conference in Paris in 2015. The Trump administration will not be able to finalize its exit until a day after the presidential election in November 2020.