The Clean Development Mechanism (CDM), a mechanism to reduce green-house gas emission as per Kyoto Protocol implies that:

Options

1. Aindustrial countries receive carbon credits by funding carbon saving projects in another relatively affluent n
2. Bindustrial countries reduce their carbon emission by using environment friendly technology in production
3. Cdeveloped countries invest in carbon reduction in developing countries and receive carbon credit in return
4. Ddeveloped nations purchase carbon credit from other nations