a. jerome has a beautifully landscaped front lawn with lots of colorful flowers. landscaped lawns produce a externality. landscaped lawns exist relative to the socially efficient quantity. b. dave takes advantage of the low price of gas to purchase a sports utility vehicle. sports utility vehicles generate a externality. sports utility vehicles are produced relative to the socially efficient quantity. c. susan decides to walk to work instead of driving. walking to work creates a externality. walks to work exist relative to the socially efficient quantity. d. anita decides to smoke a cigarette while she is waiting at a busy bus stop. cigarettes create a externality. cigarettes are produced relative to the socially efficient quantity.
