There might be a sense that global progress on the climate crisis is flagging, but experts tell Nick Ferris that there remains real hope that the summit in Brazil can drive forward the climate agenda - so long as rich countries agree to budge on the key issue of aid Sign up to the Independent Climate email for the latest advice on saving the planet Get our free Climate email Get our free Climate email Email * SIGN UP I would like to be emailed about offers, events and updates from The