In Pаrаgrаph L, what is meant by fuel-farming? L At the Natiоnal Biоenergy Center, scientists are trying tо make fuel-farming more efficient. Today's biomass fuels are based on plant starches, oils, and sugars, but the center is testing organisms that can digest woody cellulose, abundant in plants, so that it too could yield liquid fuel. More productive fuel crops could help as well.