(TIME) Justin Worland, July 5, 2018 — Environmental groups have spent the past year targeting Environmental Protection Agency administrator Scott Pruitt both as a disaster for the environment and as a model of corruption.

Now that Pruitt officially announced he was stepping down from the EPAThursday, green groups that have fought so long to stop him say his resignation will bring a whole new set of challenges. Deputy EPA administrator Andrew Wheeler, who will take over Pruitt’s job until the Senate confirms a replacement, is a former coal lobbyist who supporters and detractors of Trump’s agenda expect to continue Pruitt’s agenda effectively.

“We have no illusion both about how far Scott Pruitt is from the kind of administrator that we need and also how dangerous Andrew Wheeler would be,” Michael Brune, executive director of the Sierra Club, told TIME before Pruitt’s resignation.

Source: http://time.com/5331309/scott-pruitt-andrew-wheeler-epa/