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The Social Cost of Carbon, developed by the Obama-era Interagency Working Group (IWG), is the best available tool for measuring the economic damages from greenhouse gas emissions. It has been used in analysis for over 100 federal regulations that affect greenhouse gas emissions, as well as by a number of states in electricity and climate policy. Still, many significant impacts identified by the Intergovernmental Panel on Climate Change are difficult to quantify and so have been omitted from the IWG SCC estimates. Impacts such as increased fire risk, slower economic growth, and large-scale migration are all unaccounted for, despite their potential to cause large economic losses. Our new issue brief discusses these omissions and other variables that will influence climate outcomes. We encourage policymakers to account for this likely underestimate by viewing the SCC as a lower bound for damages.

Critics of the administrative state have been urging Congress to rein in regulatory action, claiming that regulations created by executive agencies are undesirable as a matter of policy and are in violation of constitutional principles. In a troubling development, the Trump Administration has also turned away from cost-benefit analysis in order to carry out its anti-regulatory agenda, disregarding an established bipartisan consensus that stretched back several decades. This article, published in the Michigan State Law Review, argues that this anti-regulatory position is unwarranted. These executive regulatory actions produced large net benefits to the American people, were carried out pursuant to authority delegated by Congress, and were reviewed by the courts. By contrast, more robust action by Congress, as long as Congress continues to exhibit its current gridlock on important policy issues like climate change, is unlikely to be beneficial.

Grounded in archival research spanning eight countries and five languages, as well as interviews with leading scientists from both government and industry, Poisonous Skies is the first book to examine the history of acid rain in an international context. By delving deep into our environmental past, Rothschild hopes to inform its future, showing us how much is at stake for the natural world as well as what we risk—and have already risked—by not acting.

The principle of federalism has become something of a rallying cry in recent efforts by the Trump Administration and its allies to scale back environmental regulation. For example, during his short and troubled tenure, former EPA Administrator Scott Pruitt argued that the federal government has become too intrusive and that states should be returned to a position of “regulatory primacy” on environmental matters. Some states have responded to the impeding federal retreat by forging ahead. For example, California has continued to take aggressive steps to curb greenhouse gas emissions, and has even taken steps to project its influence internationally. However, despite these hopeful signs of resistance, the net effect of the Trump Administration’s efforts to scale back federal environmental policy is likely to undermine rather than energize state environmental policymaking, especially in Republican-dominated and swing states, where the climate policy vacuum is most acute.