This chapter cites the Canadian experience to show that the twofold shift is a progressive and constructive move; the United States provides both the sources of the problem and some solutions. The first was a shift from the general principles of control to the notion of a hierarchy of control measures and the second was a recasting of the Hierarchy of Controls into what has been called a Hierarchy of Prevention and Controls. The chapter argues that certain pollution prevention measures have been construed as an attack on workers' rights; but this problem can be resolved to the benefit of both workers' health and environmental protection. Explanation of the relation of pollution prevention to Just Transition is a part of the solution. The revolt against control measures as the key to environmental protection began in the late 1980s. The key thinker and publicist of the revolt was Barry Commoner.