UN climate talks in Scotland ended with a global agreement that aimed at least to keep alive hopes of capping global warming at 1.5 degrees Celsius, and so maintain a realistic chance of saving the world from catastrophic climate change. The deal is the result of two weeks of tortuous negotiations in Glasgow that had to be extended for an extra day to balance the demands of climate-vulnerable nations, big industrial powers, and those whose consumption or exports of fossil fuels are vital to their economic development.