Reply #21: That will remain true until someone actually tries to scale up "biobutanol." [View All]

[NNadir]

All of these schemes sound wonderful in the abstract, less so in practice.

In fact, humanity survived on biofuels for several millenia, but on the other hand, life expectancy was a few decades at best and, here's the big one, the population of the planet was consistently much lower than one billion.

The oil and coal we are just finishing burning represents hundreds of millions of years of collected biofuels.