净石油现价是Correa先生预期达到的欧洲碳排放信用额市场价的四倍多。
The oil’s net present value is over four times greater than the market price of the European carbon credits Mr Correa hoped to obtain.
目前，欧洲排放交易体系这一主要的强制性市场并不承认森林碳信用额。
For the moment the main compulsory market, Europe's emissions-trading scheme, does not accept forest-carbon credits.
碳信用由已经超过其排放限制的公司或国家购买，作为平衡他们排放预算的一个方法。
Carbon credits are bought by companies or countries that have exceeded their emissions limits, as a way to balance their emissions budget.
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