It almost doesn't matter. These bio processes are only good for generating a small amount of the energy we need, but as you get to volume there is a need to add

It almost doesn't matter. These bio processes are only good for generating a small amount of the energy we need, but as you get to volume there is a need to add fertilizer in the mix. Fertilizer uses fossil fuels and energy to make, thereby negating any gains of the bio process over just using the fossil fuels and energy directly.