Who is popular today?

The U.S. is seeking to reduce the greenhouse gases it produces by at least half by 2030, as President Joe Biden carries out his decision to rejoin the Paris Agreement. America’s new commitment -- officially known as a nationally determined contribution, or NDC -- is much more ambitious than its initial one. It will need to be. Climate change hasn’t slowed enough since the landmark international pact was signed in 2015, and several other nations that have already increased their own objectives.