Yes and no. If done right, you can get bio-gas from old landfills and food waste, and that's gas that'll end up in the atmosphere anyway -- we might as well use

Yes and no. If done right, you can get bio-gas from old landfills and food waste, and that's gas that'll end up in the atmosphere anyway -- we might as well use it. Then there's the issue of growing crops for use as bio-fuel. In theory it's a renewable energy source, but in the real world it'll use valuable land that we will need for climate-friendly but inefficient organic farming for food.