I’d often considered biofuel to be an interesting development, one that could hopefully replace fossil fuels, with no real downside (though not exactly carbon neutral). However, I came across an interesting article talking about how biofuels, at least as currently envisioned, require phosphorus for growth. Meaning, we now face a ‘peak biofuel’ situation, or rather, ‘peak phosphorus’, where biofuel production capacity can be tied to limits on phosphorus production! Thus, while still worth pursuing, we need to be a bit more realistic in our expectations of how widely adopted biofuels can ever become. You can read the whole article here.