What is at the root of the problem of fuel farming, ethanol, biodiesel, or biomass for combustion?  It is the false claim that consuming biomass in flames as either solid or liquid fuel is carbon neutral.  That it only emits CO2 that has been absorbed by plants and that makes it "green", instead it makes this false claim "greenwashing".

Consider this.  Think about the natural carbon cycle, before industrialized humanity appeared on the scene..

Prairie soil was 20 to 30 feet thick, soil stored a huge millenial amount of carbon.  Wetland peat bogs were even thicker, storing more carbon.  Coral reefs stored carbon as calcium carbonate made by the coral.

Fires were started by lightning, burning biomass and releasing carbon as CO2.  Methane was released from bogs.

Some processes stored carbon, some gave off carbon.  It stable climatic periods carbon was balanced, as much was released as was absorbed.

Then combustion and chemical ag brought on by the human industrial age statred increasing carbon in the atmosphere and depleting stored carbon, stored in soil and wetlands and the living ecosystem.

In order to turn this around we need to restore the sequestration effect of the soil.  As well as putting a halt to combustion, fertilizer run off, and chemical ag that is putting carbon into the atmosphere.

To restore the soil we need to add all the biomass we can back into the soil in a way that does not produce GHG.  Liquid fuel from biomass robs that carbon by burnig it and sending it into the atmosphere.

Biomass combustion as a solid or liquid fuel is not carbon neutral, it increases carbon in the atmosphere, robbing it from the soil.