China's biomass companies are on the fast track after government policymakers approved heightened investment in clean energy technology.

Beijing said on Tuesday it plans to finish 120 biomass-fired boiler demonstration projects by 2015 to combat air pollution, according to a document jointly issued by the National Energy Administration and the Ministry of Environmental Protection.

Biomass is defined as biological material - generally farm or forestry byproducts - that can be used directly via combustion to produce heat or indirectly after converting it to various forms of biofuel.