The Kyoto Protocol is an agreement made under the United Nations Framework Convention on Climate Change to reduce greenhouse gas emissions. It commits developed countries to reduce their emissions to 10% below 1990 levels between 2008-2012. Key mechanisms to help countries meet their targets include international emissions trading, the Clean Development Mechanism between developed and developing countries, and Joint Implementation between developed countries. While many countries have ratified the protocol, major emitters like the US have not. Developing countries like China and India are not required to reduce emissions under the agreement.