News G-20 leaders end summit by calling for world trade reforms. U.S. remains holdout on Paris climate accord December 1, 2018December 1, 2018Associated PressComments Off on G-20 leaders end summit by calling for world trade reforms. U.S. remains holdout on Paris climate accord Group of 20 leaders have agreed to fix the world trading system – but only 19 of them agreed to support the Paris accord on fighting climate change.