Long-feared milestone, 400 ppm, reached for carbon dioxide

That was the sad measurement from the Mauna Loa observatory in Hawaii. This NY Times piece does the explaining. I wonder if the dozens upon dozens of fellow bicyclists I noticed on the Burlington Bikeway yesterday know (and appreciate) the fact they've used their own calories, not a fossil fuel, to move around? Other than Senator Bernie Sanders, I-Vt., and a few others in Congress, I really have to wonder just who they think they're working for. Big Oil? Big Coal?