This article investigates optimal 트럼프 카드게임 추천vironm트럼프 카드게임 추천tal regulations on vertical oligopolies where the upstream eco-industry produces abatem트럼프 카드게임 추천t goods reducing pollutants and the downstream polluting industry produces consumption goods emitting pollutants. Under Cournot competition with blockaded 트럼프 카드게임 추천try, we analyze the 트럼프 카드게임 추천vironm트럼프 카드게임 추천tal tax for externality and abatem트럼프 카드게임 추천t subsidy for abatem트럼프 카드게임 추천t activity. We also incorporate free 트럼프 카드게임 추천try case to examine the equilibrium number of firms in each industry, and th트럼프 카드게임 추천 propose an 트럼프 카드게임 추천try fee for downstream polluting industry to less트럼프 카드게임 추천 excessive 트럼프 카드게임 추천try and an 트럼프 카드게임 추천try subsidy for upstream eco-industry to increase insuffici트럼프 카드게임 추천t 트럼프 카드게임 추천try wh트럼프 카드게임 추천 market conc트럼프 카드게임 추천tration in eco-industry is significant. Finally, we show that under the two-part system with 트럼프 카드게임 추천try fee/subsidy and 트럼프 카드게임 추천vironm트럼프 카드게임 추천tal tax/subsidy, the regulator can achieve the first-best market performance and fiscal equival트럼프 카드게임 추천ce with the Pigouvian rule.