Guardian: The United Nations climate chief has urged global financial institutions to triple their investments in clean energy to reach the $1 trillion a year mark that would help avert a climate catastrophe. In an interview with the Guardian, the UN's Christiana Figueres urged institutions to begin building the foundations of a clean energy economy by scaling up their investments. Global investment in clean technologies is running at about $300bn a year - but that is nowhere where it needs to be, Figueres...