The cosmic radiation that creates C14 from nitrogen which then converts into radiated CO2 and is absorbed into plants during photosynthesis can be used for Carbon 14 dating but the data relating to the concentration in plants is hard to find. If a company is claiming to make renewable fuel from cellulosic material, the carbon in the fuel should have the same isotopic ratio as the feedstock. Does anyone know of feedstock tests others have done? Also can anyone comment about the radioactive carbon in cellulosic material and how it may react different from the normal carbon 12? Are Carbon 14 bonds stronger than Carbon 12?