TOKYO (AP) -- Honda Motor Co. has developed a way to make ethanol fuel from plant waste matter in a process that has the potential to expand the use of biofuels that fight global warming, the Japanese automaker said Thursday. Existing bio-ethanol production faces supply limits because it uses sugar and starch of sugarcane or from corn, both of which are also utilized as food. By tapping far greater supplies of inedible plant matter, such as stalks, leaves and rice straw, the new fuel takes a step toward making biofuels more practical, Tokyo-based Honda said in release. The breakthrough comes...