[jasonwatkinspdx]

Biofuels do not require hydrogen or atmospheric CO2 capture, well beyond growing plants.

Also something I learned recently is that the idea that biofuels are a no go because they compete with food is a simplistic deflection. Looking at Brazil as an example the biofuel crops like sugarcane and groundnuts are grown in marginal land in the south that wasn't being used for agriculture. The main driver of Amazonian deforestation is cattle ranching.

[Manuel_D]

Biofuels produced by growing plants is limited by the available biomass. Brazil powers it's automobiles with biofuel, but not ships. And more importantly, Brazil is a huge country with massive amounts of arable land.