Back in the late 1800s when John Wesley Powell was navigating the unknown Colorado River his agency, the US Geological Service, did vital work filling in many blank spaces on the map of the nation. USGS  is now mapping the potential of natural ecosystems to absorb and store carbon released by human activities.

As dusk settled on Lafayette Park last Sunday, after the successful “encirclement” of the White House, Bill McKibben was at the mic, wrapping up la