You should beleive it because its true. Please read my comment again carefully. Marginal demand is not an intuitive concept, but it is quite real I assure you.

You should beleive it because its true. Please read my comment again carefully. Marginal demand is not an intuitive concept, but it is quite real I assure you. Please don't be upset. My figures are from the paper "Conventional, hybrid, plug-in hybrid or electric vehicles? State-based comparative carbon and energy footprint analysis in the United States". Also see my reply to virtue3 for what I hope is a clearer explanation of the marginal demand concept. https://www.sciencedirect.com/science/article/abs/pii/S0306261915004407 https://www.sciencedirect.com/science/article/abs/pii/S03062...