Its getting hot in here: the return of El Nino
After three years of rain and floods, Australia\u2019s weather could soon flip into a hotter, drier phase \u2013 El Ni\xf1o. At home, this could mean higher risk of bushfires and severe coral bleaching, and globally, it could mean exceeding 1.5C warming for the first time. Environment reporter Graham Readfearn explains why to Laura Murphy-Oates