United States Special Presidential Envoy for Climate John Kerry, left, and European Commission President Ursula von der Leyen pose for photographers p

United States Special Presidential Envoy for Climate John Kerry, left, and European Commission President Ursula von der Leyen pose for photographers prior to a meeting at EU headquarters in Brussels, Tuesday, March 9, 2021. US special envoy for climate John Kerry traveled to Brussels Tuesday to discuss trans-Atlantic cooperation with European officials in the wake of President Joe Biden's decision to rejoin the global effort to curb climate change. (Olivier Hoslet, Pool via AP)

United States Special Presidential Envoy for Climate John Kerry, left, and European Commission President Ursula von der Leyen pose for photographers prior to a meeting at EU headquarters in Brussels, Tuesday, March 9, 2021. US special envoy for climate John Kerry traveled to Brussels Tuesday to discuss trans-Atlantic cooperation with European officials in the wake of President Joe Biden’s decision to rejoin the global effort to curb climate change. (Olivier Hoslet, Pool via AP)