CDM Methodologies

The CDM allows emission-reduction projects in developing countries to earn certified emission reduction (CER) credits, each equivalent to one tonne of CO2. These CERs can be traded and sold, and used by industrialized countries to a meet a part of their emission reduction targets under the Kyoto Protocol.
This page clearly summarizes, classifies and illustrates the methodologies available under the CDM.
Methodologies are classified into 5 main groups:
Large scale methodologies
Large scale afforestation and reforestation methodologies
Small scale methodologies
Small scale afforestation and reforestation methodologies; and
Carbon capture and storage methodologies