Responding to Climate Change: Carbon trading schemes are at acute risk from criminal gangs and fraud, a new report from Interpol warns. The police agency says uncertain regulations and a lack of oversight and transparency threaten the environmental and financial integrity of the worlds carbon markets, worth an estimated $176 billion. And it says that there is a risk that if financial instruments related to carbon trading become too complex, the worlds carbon markets could spark a financial crisis on par with 2008. The report...