The best revision for the claim as a rebuttal to the counterclaim is:
A wide range of organic materials can be used to make biomass, and sources such as algae are far more energy-dense than wood.
This revision effectively addresses the counterclaim by highlighting that not all biomass is the same and that there are more energy-efficient and less polluting sources of biomass, such as algae, which can reduce emissions compared to traditional methods like burning wood.