But big changes in the atmosphere can throw off this method, like releasing tons of extra carbon dioxide into the air from burning fossil fuels. (climatecentral.org)
Will all that extra carbon dioxide in the air be good for certain types of flora? (sciencemag.org)
Of course, all of this ignores the fact that fossil fuels were burned to make and transport the burning logs, thus adding extra carbon dioxide into the air. (treehugger.com)