President Trump has made eliminating federal regulations a priority. His administration, with help from Republicans in Congress, has often targeted environmental rules it sees as burdensome to the fossil fuel industry and other big businesses.

A New York Times analysis, based on research from Harvard Law School, Columbia Law School and other sources, counts more than 80 environmental rules and regulations on the way out under Mr. Trump.

Our list represents two types of policy changes: rules that were officially reversed and rollbacks still in progress. The Trump administration has released an aggressive schedule to try to finalize many of these rollbacks this year.