Biden cranks up US ambition as summit lifts climate hopes
Biden will announce the ambitious plans in a virtual Earth Day summit The Zoom meeting will include 40 leaders from across the world and The Pope US target aims to 'challenge the world on increasing ambition and combatting the climate crisis' Biden's action raises the pressure on China - the world's largest carbon emitter Obama had pledged to cut emissions by upto 28% by 2025 Biden has made climate change a focus of his $2trillion infrastructure package