Typical applications of LCA assume that the magnitude of life-cycle impact grows proportionally to the volume of demand. while in reality the additional impact due to marginal increase in demand may differ from the average impact. In the literature. the calculation of marginal life-cycle impacts often involves the use of optimization models. https://www.ngetikin.com/quick-offer-1-Gallon-Universal-Primer-Pro-Deep-Penetrating-Primer-big-deal/