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Carbon finance is a new branch of Environmental finance. Carbon finance explores the financial implications of living in a carbon-constrained world, a world in which emissions of carbon dioxide and other greenhouse gases (GHGs) carry a price.
Financial risks and opportunities impact corporate balance sheets, and market-based instruments are capable of transferring environmental risk and achieving environmental objectives. Issues regarding climate change and GHG emissions must be addressed as part of strategic management decision-making.
Joint Implementation and Clean Development Mechanism 
Clean Development Mechanism (CDM), is recognised through the Kyoto Protocol, allowing the offset of emissions in developed countries by the investment in emission reduction projects in developing countries like China, India or Latin America.
Joint Implementation (JI), is another mechanism, allowing investments in developed countries to generate emission credit for the same or another developed country.
Market value 
The market for the purchase of carbon has grown exponentially since its conception in 1996.
Volume (millions metric tonnes, MtCO2)
- 2005: 718 (330 in Main Allowances Markets & 388 in Project based transactions)
- 2006: 1,745 (1,134 in Main Allowances Markets & 611 in Project based transactions)
- 2007: 2,983 (2,109 in Main Allowances Markets & 874 in Project based transactions)
Dollars (millions of USD)
- 2005: 10,908 (7,971 in Main Allowances Markets & 2,937 in Project based transactions)
- 2006: 31,235 (24,699 in Main Allowances Markets & 6,536 in Project based transactions)
- 2007: 64,035 (50,394 in Main Allowances Markets & 13,641 in Project based transactions)
World Bank 
The World Bank has created the World Bank Carbon Finance Unit (CFU). The World Bank CFU uses money contributed by governments and companies in OECD countries to purchase project-based greenhouse gas emission reductions in developing countries and countries with economies in transition. The emission reductions are purchased through one of the CFU's carbon funds on behalf of the contributor, and within the framework of the Kyoto Protocol's Clean Development Mechanism (CDM) or Joint Implementation (JI). The World Bank is particularly supportive of Program of Activities (PoA) development.
See also 
- "State and Trends of the Carbon Market 2007". World Bank.
- "State and Trends of the Carbon Market 2008". World Bank.
- Carbon Finance Advisory
- Carbon Finance TV
- Carbon Finance International
- Carbon Finance Services
- Daily carbon finance news
- Glossary of Terms