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Comments (2)
Sure corn isn't the optimal crop to do this with. What about water based plants or algae which have more efficient photosynthesis? Algae has very short generation times and could perhaps be bred to produce biofuel directly, instead of an inefficient indirect process of fermenting it.
If I recall correctly, you would only need a relatively small percent of Earth's surface to produce enough fuel for current use. And it could be some undesirable land in a desert. Tubes full of water and algae is a lot cheaper than solar panels and batteries.
The linked paper is only about current practices, their benefits and harms. You're right though, about the need to address ideal near-term achievable biofuels and how they stack up against the best (e.g.) near-term achievable solar arrays.