Environmental Impact : environmental interventions were classified and
characterized into 8 impact categories
8 categories : abiotic depletion, acidification, ecotoxicity, global warming,
eutrophication, human toxicity, ozone layer depletion, photochemical oxidantion
> 1200 environmental interventions, i.e. inputs (resource use) and outputs (emissions)
Product : there were 478 product groupings
280 product groupings are for final consumption