Obama rejects Keystone XL pipeline and hails US as leader on climate change

President ends years of political drama and hands environmentalists a big victory with decision to turn down proposal to build 1,700-mile pipeline through US

Barack Obama ended seven years of high-wire political drama to reject the Keystone XL pipeline on Friday, saying the decision reflected America's determination to be a global leader in the fight against climate change.

The move, less than four weeks before more than 190 countries gather in Paris to try to reach a global deal to reduce carbon pollution, reinforces Obama's commitment to making climate change the domestic and international legacy of his second term in the White House - even in the face of Republican hostility.