Emissions permitted to countries but not "used" can be sold to countries that are over their targets. This has created a new commodity in the form of emission reductions or removals. Since carbon dioxide is the principal greenhouse gas, it is more commonly called carbon trading.
Provided the market price for credits is high, the system has incentives towards companies to reduce their emissions so they can profit from selling their excess pollution ‘credits’ to other companies who pollute over their quota.
Every company uses energy and resources, emitting pollution during the process. Today, this energy use and pollution can be measured in tonnes of emitted carbon dioxide. Companies can look at all aspects of their business to assess their overall carbon emissions, to produce an approximate company ‘carbon footprint ’.
As of July 2010, a cap was put on the emissions of the six main greenhouse gases under the Kytoto protocol. Industrialised countries have agreed to cut their yearly emissions of carbon, as measured in the six greenhouse gases, by varying amounts as compared to 1990. In order to reach this target countries were given quotas – or caps – on their greenhouse gas emissions. However, presently inspite of the various international environmental meeting, the Kyoto protocol has failed to verify.
A country can then meet its emission targets by allocating the big polluting companies within their country a set number of allowances, capping their emissions and allowing them to trade with one another or companies from other countries.
The EU adopted the Kyoto mechanism in 2005 and now has the most developed carbon trading market – the EU Emissions Trading Scheme (EU ETS) – involving all EU countries. It covers around half of the EU’s total CO2 emissions. A second round of trading began in 2008 and will run until 2012.
Under the EU ‘cap and trade’, each government allocates their given credits as they see fit among its heaviest polluting industries, including power generators, steel, cement and ceramics companies.
Aviation, aluminium and ammonia production have been included from 2012. Companies must submit their annual emissions figures and ensure they have sufficient carbon credits to cover them. This has caused ruffles in Indian Airline industry, with Airlines hiking up their price rates to Europe.
Operators that pollute over their allowance have the option of buying credits from companies that have excess. Implementing more energy efficient production processes or switching to low emissions fleets, for example, will reduce a company’s total emissions.
By selling their excess credits, such companies should be able to recoup some of the initial capital costs of greening their business while over-polluters are forced to pay for more credits if they fail to cut their emissions.
There are four types of carbon credits:
The biggest criticism of the EU trading system is that the cap isn’t tight enough to provide the economic incentives companies need to cut their emissions.
An over allocation of pollution permits in the first round of trading meant companies easily stayed within their allowance and the market was flooded with near-worthless excess credits.
The start of the second round of trading in 2008 has been hit by the global recession that has caused a steep drop in output and therefore carbon emissions.
Carbon credit trading – how does it work?
- One allowance is the equivalent to one metric ton of
emitted CO2.
- Allowances can be traded privately or on the
international market at current market prices.
- Allowances are usually priced in Euros per tonne of
carbon dioxide or its equivalent (CO2e).
- Five markets exist for trading carbon allowances: the
European Climate Exchange, the Chicago Climate Exchange, Nord Pool,
PowerNext and the European Energy Exchange.
- Many private companies now provide carbon offsetting
projects to generate credits that can be sold on one of the trading
markets to over-polluters.