Did you know that, when misused, biomass burning emits dangerous particulate matter? Yet, this renewable energy source from plants and animals is abundant in the Alps and could increase the energy self-sufficiency of the region. BB-CLEAN developed transnational policies for a sustainable use of biomass for domestic heating, minimising the impacts of biomass burning on natural ecosystems, human health and climate change. The project helped to raise awareness on the effects of biomass burning on health and the environment.