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The question is not use or not, but what discount rate to assume. See https://www.carbonbrief.org/qa-social-cost-carbon#discount for discussion in regard to CO2 and this OECD NEA publication for explanation how massive impact discount rate has on LCOE
https://www.oecd-nea.org/ndd/pubs/2018/7441-full-costs-2018-es.pdf
