The Clean Power Plan
Over the past decade, global warming emissions and fuel consumption by commercial vehicles has continued to increase, while those of passenger vehicles is declining. We need strong standards for heavy-duty vehicles to put the entire transportation sector on a sustainable future course. (1990-2011 data from EPA; 2012-2040 data from EIA)
If you ignore the benefits side of the cost-benefit equation, it's hard to come up with anything but bad news. But when you take a solid look at both sides of the equation, you see a pretty impressive net-positive.