New York City's daily carbon dioxide emissions visualized. Each sphere represents a ton of carbon. Photo by Carbon Visuals, used under Creative Commons licensing.We know we have a carbon problem, but solving it is easier said than done. In The Case for a Carbon Tax: Getting Past Our Hang-Ups to Effective Climate Policy, economist Shi-Ling Hsu outlined a persuasive argument that pricing carbon is a strategy that can create real results—while appealing to people across the political spectrum. His pragmatic, clear-headed approach is inspiring at a time when climate change is a more pressing issue than ever that government seems ever less able to tackle.