Draw graphs of the U.S. strawberry market in long-run equilibrium before the pollution crackdown: one of the U.S. market and one of a California grower. Now show the short-run effects of the pollution crack down.

California plans to crack down on the use of fumigants by growers of strawberries. The biggest burden will fall on Ventura County’s growers, who produce about 90 percent of the nation’s crop.