Leaders dial up doomsday warning to kick-start climate talks

Oxfam 'Big Head' caricatures of world leaders Joe Biden, Boris Johnson and Angela Merkel, protest on the fringes of the COP26 U.N. Climate Summit Monday in Glasgow, Scotland. (AP Photo/Scott Heppell)

GLASGOW, Scotland — World leaders turned up the heat and resorted to end-of-the-world rhetoric Monday in an attempt to bring new urgency to sputtering international climate negotiations.