Two good energy-related articles on Phys.org

One: Mileage from megawatts: Study finds enough electric capacity to 'fill up' plug-in vehicles across much of the nation -- sufficient electric production capacity exists right now to replace 84% of gas-fueled vehicles in the US.

and

Two: Why a hydrogen economy doesn't make sense -- a detailed analysis shows why electric cars are at a minimum three times more efficient than using hydrogen to fuel cars.