Climate Change News: The day of the 2016 Olympic opening ceremony in Rio de Janeiro, Brazil, the mood is jittery. In the teeth of a recession and political crisis, the carnival city faces protests and health fears over the zika virus outbreak and polluted water. It wont stop half a million people showing up for two weeks of world class sporting drama. Meanwhile, as part of a drive to get cities involved in climate action, Rio has filed a report on the threats posed by global warming. Disclosed under the CDP cities...