US Special Presidential Envoy for Climate John Kerry calls on the world to work together at the COP26 summit in Glasgow in November, when leaders from across the globe will seek to agree action to combat climate change. "Every economic study shows it is far less expensive to deal with the climate crisis now than it will be to wait for the future," he said during a visit to New Delhi. "And the world can’t do it if everybody doesn’t sign up to be part of the solution." IMAGES AND SOUNDBITES