by Stéphane ORJOLLET Agence France-Presse PARIS, France (AFP) – Half a degree Celsius may not seem like much, but climate experts say a world that has warmed 1.5 degrees Celsius above 19th-century levels compared to 2C could be the difference between life and death. A 2C Earth would see the number of people facing extreme heat waves more than double. A quarter of a billion more people would face water shortages. The Arctic Ocean will […]