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 carbon credits, which may be traded between countries or organizations. Topics The environmentc2碳信用(指有权拥有且可交易的温室气体排放量) 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 Topics The environmentc2碳补偿信用额(购入后用以抵消自身碳排放量)