What are the options to make sustainable biofuels instead of from plants?
We need better options than photosynthesis, that is less than 1% efficient. CO2 and light are abundant all over the planet. PV effciency is near 10% but make only electricity, when there is light (day ight) Are electrofuels a real option? Where hydrogen can come from? How much water electrofuels need? What about algae? Are they going to be produced industrially and economically? When ? What is the maximum cell density? How to separate them and extract value from biomass?