The Nickel Report

The U.S. Department of Justice (DOJ) recently filed four lawsuits against states related to specific climate change actions they have taken or planned to take. On April 30, 2025, DOJ preemptively sued Hawaii and Michigan to prevent both states from going forward with their stated intent to pursue legal action against fossil fuel companies for alleged harms caused by climate change and to declare those states’ claims unconstitutional. The following day, on May 1, 2025, DOJ sued New York and Vermont for their enactment of climate “superfund” laws, which create retroactive cost recovery claims on producers of fossil fuels, seeking to enjoin the enforcement of those statutes and to have them declared unconstitutional as well.

Last week marked the conclusion of the 28th Conference of Parties (COP28) to the United Nations Framework Convention on Climate Change (UNFCC) in Dubai, United Arab Emirates (UAE). As we previously discussed, the expectations were COP28 would tackle a range of critical issues toward achieving the climate goals set out in the Paris Agreement. Below is an overview of the most significant developments coming out of Dubai, as reflected in the COP28 agreement, and the expectations for future climate action.