Parts Per Billion

Here's yet another complicated and confusing question about the transition to a post-greenhouse gas world: Is what's billed as low-carbon gasoline good or bad for the environment?That's the question lawmakers in several Democratic-led states are asking themselves, and no easy answers are appearing.New Mexico, New York, and Minnesota, to name a few, have debated new standards that would encourage the adoption of more climate-friendly auto fuels, either through blending with ethanol or with another type of biofuel. But in all of these states, these measures failed amid opposition from environmentalists, who say a new fuel standard would simply delay the abandonment of fossil fuels altogether.On today's Parts Per Billion, our biweekly environmental law podcast, we hear from reporter Zach Bright about why low-carbon fuel standards are struggling to gain traction at the state level, despite support from high-level Democrats. Bright also talks about the states that have managed to adopt their own standard, and how