Economist: ChesChem, a chemical manufacturer located in Chester, uses natural gas for its enormous energy needs  Currently, natural gas costs twice as much in Chester as it does in Tilsen  If the cost of natural gas in Chester becomes more than twice that in Tilsen, ChesChem will move its manufacturing operations to Tilsen
So if the cost of natural gas in Chester increases at all, ChesChem will move its manufacturing operations to Tilsen
ChesChem would not be profitable if its energy costs increased