what are different types of conversion under this mass?
Thermal conversions,Chemical conversion,Biochemical conversion,Electrochemical conversions.
Biomass
Thermal conversion processes use heat as the dominant mechanism to upgrade biomass into a better and more practical fuel. 
the greatest amount of energy in a community in the UNANSWERABLE what is sustainable energy? Sustainable energy is energy produced and used in such a way that it "meets the needs of the present without compromising the ability of future generations to meet their own needs." what is the backdrop behind this? UNANSWERABLE what are the different power systems generated through this? Renewable energy sources such as solar, wind, and hydroelectric energy what is the historical account behind the aforesaid energy just mentioned? Prior to the development of coal in the mid 19th century, nearly all energy used was renewable. Almost without a doubt the oldest known use of renewable energy, in the form of traditional biomass to fuel fires, dates from more than a million years ago. what is the definition of the first type? Biomass is plant or animal material used for energy production, or in various industrial processes as raw substance for a range of products what is the neutrality of carbon under this mass? On combustion, a plant's absorbed CO is released back into the atmosphere. After a period of growth, ranging from a few months to decades, this combusted CO is re-absorbed by new plants. how is this mass related to stocks? UNANSWERABLE
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Biomass [SEP] Thermal conversions
Thermal conversion processes use heat as the dominant mechanism to upgrade biomass into a better and more practical fuel. The basic alternatives are torrefaction, pyrolysis, and gasification, these are separated principally by the extent to which the chemical reactions involved are allowed to proceed (mainly controlled by the availability of oxygen and conversion temperature). There are other less common, more experimental or proprietary thermal processes that may offer benefits, such as hydrothermal upgrading. Some have been developed for use on high moisture content biomass, including aqueous slurries, and allow them to be converted into more convenient forms.