Millions of Americans are coming to grips with the broad social and political ramifications of Donald Trump’s stunning upset victory in last Tuesday’s presidential election. And while the president-elect’s policy pronouncements to date have been short on detail, one thing is clear: those concerned with environmental protection and climate change had better buckle up for a wild ride.

As a 15-year veteran of the U.S. Environmental Protection Agency (EPA) and former agency enforcement official, I served under both Republican and Democratic administrations and played key roles in briefing incoming political leadership during transitions. As I know up close, for better or worse, federal agencies are not nimble and do not steer on a dime, a fact that often frustrates new political leadership.