It's obvious. On the other hand, if you only look at the environmental impact, you can hurt people's livelihoods."

VOA: standard.2010.02.22

There's now an environmental history being written of the impact of the Market Revolution.

如今人们正在编纂一部环境的历史,内容是自然环境受到市场革命后的影响

耶鲁公开课 - 美国内战与重建课程节选

If the vehicle in the unfortunate circumstances of a collision, has to be able to maintain the security of the hydrogen which means more mass, which means a lot of the efficiency is being squandered What's the environmental impact of hydrogen production?

如果车辆,在碰撞中发生了不幸，要仍然能够保持氢气的安全性的话,意味着需要更多的质量，也就是说大部分效率被浪费了,制氢对环境有什么影响呢？

麻省理工公开课 - 固态化学导论课程节选