> CO2 sequestration Or perhaps design buildings with windows that people can open? At the risk of sounding facetious, I think most people underestimate how mu

> CO2 sequestration Or perhaps design buildings with windows that people can open? At the risk of sounding facetious, I think most people underestimate how much CO2 is produced by 20 odd people in a room. Equally we underestimate how much air is renewed by just opening a window.