Reuters: China's clean energy pledges are prompting a supply of new financing tools to fund the estimated 43 trillion yuan ($6.53 trillion) needed to switch from heavy, polluting industries to clean projects. The Beijing Environment Exchange endorsed a call option backed by 20,000 local carbon permits on Thursday, the first of its kind in China, which was bought by trading firm CMB Sinolink. Rival bourse, the Shanghai Environment and Energy Exchange, also plans to launch four forward contracts to trade...