The idea behind biomass is that it's fuel that can be cultivated and harvested. Be it wood, corn, soya beans, palm or cane, or whatever, you grow "fuel". You burn it, and then you burn each year a new harvest.
The best thing about it is that any CO2 released by its burning is CO2 which was absorbed by it during the previous year rather than millions of years ago so the net release of CO2 into the atmosphere is zero.
EDIT: Just noticed you already wrote words to that effect in a previous post!
However, we are creating more and more human beings and they emit CO2 and use O2. They also require more living space and to do that they burn biomass (forests) to clear areas for homes. They use the wood and plant materials for construction. The burning of forests to clear areas is so extensive in some areas that it can be clearly seen from space.
Thus the cycle is short circuited and the net is increased CO2 emission.
Ever-increasing worldwide human population is the problem. Energy conservation is but a delaying tactic. There is no real, long-term answer other than far fewer people. Won't happen until the whole thing crashes.