Factories that gave out harmful gases were all shut down after the policy came into effect.

在政策生效之后，所有排放有害气体的工厂都关闭了。

youdao

Its peak, that is, there is the most carbon dioxide and methane gas, greenhouse gases in the atmosphere just after the beginning of the interglacial period.

它的峰值，就是在间冰期刚开始，大气中有最多的二氧化碳和甲烷气体，温室气体。

youdao

After cremation, water is used to cool gases in the crematorium chimney.

火化之后要用水来冷却火葬场烟囱中的气体。

youdao

Chlorine gas was used by both sides during World War I but was banned by the Geneva Protocol, along with the use of other poison gases, after the end of the war.

CNN: Al Qaeda's track record with chemical weapons

He is now representing a new coalition, "All Risk, No Reward, " which opposes Keystone XL. It goes after the additional greenhouse gases but also showcases the damage causes by spills to Americans in the heartland.

CNN: Oil, money and politics; EPA snags Keystone XL pipeline

After climbing relentlessly to reach 781 megatonnes last year, Canada's emissions of gases linked to climate change will start to fall within three years, he promised.

ECONOMIST: Trying again on emissions policy