1. Scott Pruitt may be out at the E.P.A., but his legacy lives on.

His successor, Andrew Wheeler, is expected to continue dismantling Obama-era regulations and reshaping the agency into one more friendly to industry. Mr. Wheeler, a former coal lobbyist, is seen as a consummate Washington insider who has spent years effectively navigating the rules.

We looked at five E.P.A. policy battles that lie ahead, including loosening restrictions on car emissions and scaling back the Clean Water Act. Above, a Tennessee Valley Authority Fossil Plant involved in a Clean Water Act dispute.