How much is carbon worth? The cost of a permit for a European factory or power plant to emit a tonne of carbon dioxide has risen fivefold over the past three years. It topped €100 a tonne on Tuesday.
碳值多少钱？欧洲工厂或发电厂每排放一吨二氧化碳的碳排放许可成本在过去3年里上涨了5倍。周二，碳价突破了每吨100欧元。
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