Nobel laureates condemn Keystone as climate-change trigger

WASHINGTON — Ten Nobel Peace Prize winners from as far afield as Yemen, South Africa and Argentina have signed a letter asking U.S. President Barack Obama to deny a permit for the Keystone XL pipeline that would transport oilsands bitumen to Texas Gulf Coast refineries.

The laureates, who include former U.S. president Jimmy Carter and Archbishop Desmond Tutu of South Africa, argue that denial of a permit would send a strong signal to the world that the U.S. is rejecting a fossil fuels future.