While reading the Ask Umbra column on the Grist website I came across a cool graph that shows the rate of CO2 emissions per passenger mile for most of the common commuting options. Produced by Sightline, a think tank based in Seattle, the graph provides a visual representation of something that’s on a lot of people’s minds as they make their way to work every morning.It’s an uncomplicated way to look at an often overcomplicated issue: What is the most climate-friendly way for me to get to work?