Depends on what they mean by biofuels. Many current biofuels are net energy losers, and specifically require more fossil fuel as (energy) input than they yield

Depends on what they mean by biofuels. Many current biofuels are net energy losers, and specifically require more fossil fuel as (energy) input than they yield in energy output. Moreover, I'd expect the food-vs-fuel issue to become significantly more prominent as population increases.