Others will hedge by buying extra allowances when carbon prices are low, as power companies now do routinely.

其他公司则会在碳价格较低时购买额外配额来避免损失，就像电力公司现在经常做的那样。

Europe's gas shortage is prompting some energy producers to switch to coal so they need to buy more allowances to offset the extra emissions they're creating.

欧洲的天然气短缺正促使一些能源生产商转向使用煤炭，因此他们需要购买更多的配额来抵消他们创造的额外排放。