Comment Re:Most fungi breathe oxygen, expel carbon dioxide (Score 2, Insightful) 244
Except the fungus is getting its carbon from cellulose in the first place. That cellulose was made from a plant that did fix CO2 from the atmosphere. So really, any industrial application of the fungus would be only step 2 in a three step process. 1) grow cellulose 2) use fungus to turn cellulose into fuel 3) burn fuel. While steps 2 and 3 are not carbon neutral, that ignores step 1, which should make up for the deficit.