就是前些天那次Live Earth全球演唱会
Organizers promised the huge shows were made green by using recycled goods and buying carbon credits to offset the inevitable high power bills.

碳排放信用

碳信用额度(carbon credits), 即获得二氧化碳的排放配额。

引用:

Carbon credits are measured in units of certified emission reductions (CERs). Each CER is equivalent to one tonne of carbon dioxide reduction. India has emerged as a world leader in reduction of greenhouse gases by adopting Clean Development Mechanisms (CDMs) in the past two years.

Developed countries that have exceeded the levels can either cut down emissions, or borrow or buy carbon credits from developing countries.

Reducing carbon credits
Organizations such as Rainforest Credits and Tropical Sierra are working in conjunction with universities all over the world to build an online information database known as the Rainforest Encyclopedia for businesses and industries to research and calculate what they need to invest in to offset their greenhouse gas emissions.

From Wikipedia

看来wikipedia百科的确是一本好词典啊

看来京都议定书还是要全民了解啊...

原来还是个专业用语

谢谢了哈!