Chemistry Postdoctorate Fellow Reuben Hudson explains the meaning of carbon neutrality: that there is no net increase in atmospheric CO2. At Colby this is largely due to the biomass heating plant that burns wood rather than oil. Hudson explains that in any biomass-fueled heating system, whether as small as a woodstove or as large as Colby’s heating plant, the CO2 released into the atmosphere from the burning wood is the same as the CO2 previously taken up by the growing tree.