1) The document discusses the principles of offsetting and the Clean Development Mechanism (CDM) and Joint Implementation (JI) under the Kyoto Protocol. 2) It provides examples of how emission trading schemes work using a cap and offset system. Offsets are generated by carbon reduction projects in developed countries under JI and developing countries under CDM. 3) Statistics are given on CDM projects worldwide, showing the majority are from China and focus on reducing HFCs, PFCs and N2O emissions. Over 9,000 CDM projects have been proposed with over 3,700 registered but not all have been issued carbon credits due to issues like the financial crisis.