As large consumers of fossil fuels, First World countries drew attention to environmental pollution. The Kyoto Protocol is a treaty that is based on the United Nations Framework Convention on Climate Change, which was finalized in 1992 at the Earth Summit in Rio. It proposed to place the burden of protecting the climate on the United States and other First World countries. Countries that were considered to be developing, such as China and India, were not required to approve the treaty because they were more concerned that restricting emissions would further restrain their development.