Climate Change Legislation Post-2000

During the late 20th and early 21st centuries, environmental activism played a significant role in shaping American policy and public opinion about climate change and sustainability. Various movements sought to address issues such as deforestation, pollution, and fossil fuel consumption. In this context, one of the more influential pieces of legislation passed was the Clean Air Act, which aimed to regulate air emissions and improve air quality. Understanding the impacts of such movements and policies is essential to grasp the broader environmental concerns of this period.

Which of the following movements or policies was specifically focused on addressing issues related to climate change and greenhouse gas emissions after 2000?