Generating electricity from renewable sources is more expensive than conventional approaches, but reduces pollution … and solar. Likewise, the pollution benefits from renewable generation depend on what type of generation it displaces …

This article proposes and evaluates four hypotheses about US pollution and environmental policy over the last half … century. First, air and water pollution have declined substantially, although greenhouse gas emissions have not. Second …, environmental policy explains a large share of these trends. Third, much of the regulation of air and drinking water pollution has …

-friendly innovation, we focus on a process innovation, rather than on end-of-the-pipe solutions to pollution. Moreover, while previous …