Prodotti da costruzione in un'ottica di sotenibilità ambientale. Parte 2*

Artificial materials are commonly considered to be characterized by significantly greater environmental impacts, due to the extensive consumption of energy and resources necessary for their extraction, processing, production and distribution. These impacts are generally compared with the (theoretically believed) carbon-neutral impacts of biobased materials often represent an intriguing alternative, from an environmental point of view, is linked to the carbon sequestration process, or the plant element capacity to absorb CO" during their growth and to store it during till end of life. But what happens at the end of life of a biobased material? there are numerous studies that have recently investigated the carbon sequestration process with greater attention as it is a discriminating element in the impacts asessment of biobased material used in building construction. The CO2 balance in a full LCA from cradle to grave of a biobased material strongly varies also because of the end-of-life scenarios (landfill, incineration with energy recovery, nceneration without energy recovery, recycling) and the related impacts of biogenic carbon linked to the disposal phase. biogenic CO2 emissions deriving from the degradation or combustion of biomass at the end of life, are not always considered in LCA building assessment and, s far, there is no clear consensusmon the biogenic carbon flux calculation methods that causes a serious uncertainties on the quality and comparability of the results.