Disney CEO Bob Iger resigned from President Donald Trump’s business advisory council after the president pulled the U.S. from the Paris Climate Agreement.

“As a matter of principle, I’ve resigned from the President’s Council over the #ParisAgreement withdrawal,” Iger said in a tweet Thursday evening.

Iger joined Trump’s Strategic and Policy Forum when it was created in December as a group of business leaders who offer the president economic advice. But he hasn’t attended any of the meetings. The group is led by Stephen Schwarzman, chief executive of Blackstone Group LP and includes Indra Nooyi, the chief executive of PepsiCo Inc and Jamie Dimon, chief executive of JPMorgan Chase & Co .

“Protecting our planet and driving economic growth are critical to our future, and they aren’t mutually exclusive,” Iger said in a statement. “I deeply disagree with the decision to withdraw from the Paris Agreement.”

Trump said the 2015 agreement with 195 countries imposed unfair environmental standards on American businesses and workers, while critics complained his withdrawal weakens efforts to combat global warming.

Iger is the third top executive to quit the advisory panel.

SpaceX CEO Elon Musk left the Strategic and Policy Forum, hours before Iger’s exit. He also said he would leave Trump’s manufacturing jobs council.

“Am departing presidential councils. Climate change is real. Leaving Paris is not good for America or the world,” the billionaire inventor said in a tweet Thursday afternoon.

Uber CEO Travis Kalanick left in February, after Trump established a temporary ban on travel from seven Muslim-majority nations.