The Kyoto Protocol and GHG

The Kyoto Protocol is an international treaty aiming to reduce the greenhouse gas (GHG) emissions believed to cause global warming and climate change, the most pressing environmental issues of our time. The treaty requires developed countries to reduce GHG emissions to below 1990 levels, but does not set binding limits on developing countries such as China.
However, the parties to the Kyoto Protocol recognized that reductions in GHG emissions can often be achieved more economically in developing countries than in developed countries themselves. Therefore the parties created the Clean Development Mechanism (CDM).
The CDM enables developing country parties who carry out projects that reduce GHG emissions to receive credits for these reductions. These credits can be sold to developed country parties, which use them to offset their own emission reduction requirements. For the developed country party this is often a more cost-effective option than reducing reductions from their own domestic operations.

The above introduction to the Kyoto Protocol is taken from Arreon Carbon's website. You can find more information at http://www.arreon.com/