(20) Robert Peston on Twitter: "“1.5 will be very difficult. I doubt we will be able to achieve that”. Bill Gates tells @Jeremy_Hunt for @Policy_Exchange that limiting climate change is the greatest challenge mankind has ever faced and he fears global warming will ultimately exceed 1.5 degrees…" / Twitter

(20) Robert Peston on Twitter: "“1.5 will be very difficult. I doubt we will be able to achieve that”. Bill Gates tells @Jeremy_Hunt for @Policy_Exchange that limiting climate change is the greatest challenge mankind has ever faced and he fears global warming will ultimately exceed 1.5 degrees…" / Twitter