In 2021, which administration brought the United States back into the Paris Agreement?

• A. The Obama administration
• B. The Trump administration
• C. The Biden administration
• D. The Clinton administration

Answer: (C)

This question hinges on understanding how U.S. participation in the Paris Agreement changed with different presidencies. The Paris Agreement is a global climate pact the United States joined during the Obama administration, but the subsequent Trump administration withdrew. In 2021, the Biden administration reversed that move: early in his term, Biden moved to rejoin, and on February 19, 2021, the United States formally re-entered by submitting its instrument of acceptance to the United Nations Framework Convention on Climate Change. This sequence shows how a change in leadership can shift international commitments quickly, reaffirming the U.S. role in global climate governance.