Final answer:
The United States did not sign the Kyoto Protocol due to economic concerns and the exclusion of certain countries.
Explanation:
The United States did not sign the Kyoto Protocol, an international agreement aimed at reducing greenhouse gas emissions. The decision was influenced by concerns about the impact on the economy and the exclusion of rapidly industrializing countries like China and India.
Learn more about Kyoto Protocol here:
https://brainly.com/question/12217621
