Donald Trump has announced that he will withdraw the US from the Paris climate change agreement, a sweeping step that fulfills a campaign promise while acutely dampening global efforts to curb global warming.
Speaking from the White House, Trump said he was open to renegotiating aspects of the agreement, which was inked under his predecessor and which all nations except two have signed onto.
In triggering the official withdrawal procedures, Trump has sparked a lengthy process that won't conclude until November 2020 -- the same month he's up for reelection, ensuring the issue becomes a major topic of debate in the next presidential contest.
