» Wed Jun 22, 2011 3:53 am
Doesn't seem very efficient, really. Obviously it wouldn't be a perfect cycle since the materials our body uses are not then flushed out, so we'd still need to be eating mostly "normal" food to survive. How many resources are being consumed to convert it into an edible form, compared to resources spent on cows? Is it really a "waste" of this material, considering that this stuff is food for microorganisms and a source of minerals for plants (i.e. fertilizer) that helps fuel the later parts of the cycle that provide us with food?
I don't really see this becoming necessary or widespread outside of some kind of emergency starvation measure.