Hope that is not a typical non numeric left question. Simply put life on Earth, at least as we know it, requires CO2 Maybe this will help http://notrickszone.com/2013/05/17/...-are-still-dangerously-low-for-life-on-earth/
PH2 Hydrogen at a crossroads: Plug Power, Pure Hydrogen and Nel ASA between opportunity and crisis – Your profit strategy
