When calculating product lifecycle footprints, manufacturers must not only take the end-use of products into account, but must also look at carbon emissions associated with the raw materials.
從產品生命週期的角度來看，除了使用端需要製造商「跨界」代為籌劃外，碳排放量僅次於使用端的「原料端」也同樣要由製造商來整合。