a key element in the system of national and international carbon trading. A country or organization has the right to produce a particular amount of carbon dioxide and other gases that cause global warming, which is expressed in terms of <b>carbon credits</b>, which may be traded between countries or organizations.

a carbon offset, which a person or company may choose to buy as a way of reducing the level of carbon dioxide for which they are responsible

<i>Wind energy companies sell carbon credits to consumers.</i>

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