Asia Times: Fueled by concerns over surging oil prices and accelerating global warming, resource-poor Japan is revving up its drive to promote biofuels. Most publicly, tax changes aimed at encouraging motorists to use bio-gasoline are expected in a few months after the world’s second-largest economy and third-largest oil consumer started to sell bio-gasoline at a limited number of gas stations earlier this year on a trial basis. A preferential tax system for bio-gasoline is expected to be …