Olivia Guarna

12 posts
Olivia Guarna is the Climate Justice Fellow at the Sabin Center for Climate Change Law at Columbia Law School.

Examining the Remarkable Rise of Ultra Vires Claims Against the Executive Branch

Since 2016, presidents and their administrations have increasingly drawn lawsuits arguing that they are overstepping their authority. In these ultra vires claims, litigants contend that presidential actions—including, for example, executive orders, proclamations, or memoranda, as well actions by executive agencies done at the President’s behest—exceed the scope of the authority […]

100 Days of Trump 2.0: The Inflation Reduction Act

This post is part of a new Climate Law Blog series, 100 Days of Trump 2.0, in which the Sabin Center offers reflections on the first hundred days of President Trump’s second term across a variety of climate-related topics. To read other posts from the series, which will roll out […]

100 Days of Trump 2.0: Updates from the Climate Backtracker

This post is the first of a new Climate Law Blog series, 100 Days of Trump 2.0, in which the Sabin Center offers reflections on the first hundred days of President Trump’s second term across a variety of climate-related topics. To read other posts from the series, which will roll […]

Interior Clears a Path for Fossil Fuel Development without Environmental Review

Yesterday, the Department of the Interior published a press release announcing the establishment of emergency permitting procedures to facilitate the rapid development of fossil fuel resources. Interior takes this action to fulfill a White House directive to rely on any and all emergency authorities to spur domestic energy production in […]

EPA’s Attacks on Greenhouse Gas Reduction Fund and the Fate of IRA’s “Green Banks”

The Greenhouse Gas Reduction Fund (GGRF), one of the most critical climate spending programs in the Inflation Reduction Act (IRA), has come under significant fire from the Trump administration. In the span of twenty days, EPA has blocked GGRF awardees from accessing their grant accounts, made baseless accusations of program-wide […]

Environmental Justice Is under Attack: We Need Local Advocacy Power Tools

NEW Community Advocacy Tools Released by WE ACT for Environmental Justice and Columbia University’s Sabin Center for Climate Change Law In January of 2025, the Trump Administration removed almost 80 crucial executive orders, including those supporting environmental justice, and set into motion a false “energy emergency” and directives to “Unleash […]