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....

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....

Climate-related foreign aid is on the rise, with signatories to the Paris Climate agreement pledging US$100 billion annually to promote mitigation and adaptation in recipient countries. While this seems like a welcome development, we have little evidence that climate aid actually encourages...

This paper assesses the National Greening Program (NGP) process as implemented in the field and the environmental impacts. The municipalities of Sta. Cruz in Zambales, Basilisa in Dinagat Island, and Hinobaan in Negros Occidental were randomly selected from all the NGP sites. The methodology...