As of September 2011, 191 states have signed and ratified the Kyoto protocol.

National targets range from 8% reductions for the European Union and some others to 7% for the US, 6% for Japan, 0% for Russia, and permitted increases of 8% for Australia and 10% for Iceland. As of September 2011, 191 states have signed and ratified the protocol.The only remaining signatory not to have ratified the protocol is the United States.