Kyoto+Protocol

The Kyoto Protocol is a legally binding contract stating that an industrial country that signs it will reduce their greenhouse gas emissions to their targeted levels. They are being monitered to see if they are actually reducing the amounts. Carbon dioxide, methane, nitrous oxide, sulfur hexafluoride, HFCs, and PFCs are the greenhouse gases that are supposed to be brought down.**
 * THE KYOTO PROTOCOL

The United States of America has not signed this document. Here is a website that might help to explain why. [|Why Hasn't The Us Signed The Kyoto Protocol]