So long as it doesn't mean people going hungry because food crops have been replaced by cash crops, and that forests haven't been chopped down to make plantations for palm-oil, and so forth, biofuel makes a lot of sense.

A combination of biofuel with wind, wave and solar power, is the only viable future for us, and it will have to be combined with an end to wasting energy the way we do now.

Of course the way we organise things today mean that none of those things can be ensured, but it wouldn't in principle be hard to do them. Not hard, but it probably won't happen until millions have died and countless millions had their lives torn apart.