CHRIS KNAPTON / SCIENCE PHOTO LIBRARY CHRIS KNAPTON / SCIENCE PHOTO LIBRARY
Hopper storing biomass pellets. Technician checking the biomass boiler system, which consists of a hopper (that stores wood chips in pellet form, foreground) and feed lines (white) to the red boilers (background). The boilers release bioenergy from the pellets in the form of heat. Photographed in Nottinghamshire, UK.
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