The elusive consensus on life-cycle assessment

Scientific consensus is urgently needed on the "impact assessment" stage of life-cycle assessment (LCA) - where emissions and other impacts are aggregated into a single score - according to LCA practitioners at a Society of Environmental Toxicology and Chemistry (SETAC) conference in April. About ten methods are currently in use or being developed and the findings of an LCA can be turned on its head depending on which one is used - leaving the technique still open to abuse.

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