What's the issue with these? Biomass plants take the energy from biologically degradable farm and food waste that would otherwise decompose and degrade, releasing its energy as methane and other byproducts into the atmosphere, on either farm fields (where it contributes to overfertilization of fields and water bodies by runoff) or on dung piles/compost heaps.
Modern farming, particularly livestock farming, produces an awful lot of such waste that needs to be taken care of, and small but livestock-intensive countries such as Denmark or the Netherlands have to ship the biowaste across the EU because by EU regulations and practicality they cannot dispose of it domestically.
Biomass reactors make the process a whole lot easier. They take the biowaste, extract all energy they can by having bacteria and fungi break it down, burn the gas for electricity and district/local heating, and the solid remainder can then be landfilled safely.
