How is biomass energy conserved?

Conservation of energy is a principle of Physics which has always been a law of nature. Biomass can be used to produce power-but really this is just another fuel to be burned to produce heat for a power plant. It is not classed as a fossil fuel because it uses vegetation which has grown recently, but it still produces CO2. However since the plants in question have grown recently and during growth have absorbed CO2, it can be considered as carbon neutral. There are arguments that if the dead plant material is left to rot, as it would naturally with no human intervention, it will produce methane which is a worse greenhouse gas than CO2, whilst if it is burned methane will not be formed.

Burning biomass material in the US currently produces a peak of 1700 MW, which is a bout 0.5 percent of total generation.