San Francisco Chronicle: California’s Air Resources Board on Thursday approved a first-in-the-world regulation to minimize the amount of carbon in fuel, putting California on the cutting edge of promoting alternative fuels in a bid to combat global warming. The regulation will require fuel manufacturers to cut the so-called carbon intensity of fuels sold in the state 10 percent by 2020 – lowering the amount of greenhouse gases released for every unit of energy produced. If the regulation’s goal is reached, it …