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emission

Word family
e·mis·sion /ɪˈmɪʃən/ ●○○ noun  
1 [countableC usually plural]TIF a gas or other substance that is sent into the air 排放物,散发物
 Britain agreed to cut emissions of nitrogen oxide from power stations.
英国同意减少发电站氮氧化物的排放量。
2. [uncountableU]SEND the act of sending out light, heat, gas etc 〔光、热、气等的〕散发,排放
nCOLLOCATIONS
ADJECTIVES/NOUN + emissions
harmful emissions (=likely to cause harm to people or the environment)
The law is designed to limit harmful emissions.
toxic emissions (=poisonous)
By the end of the decade we could reduce toxic emissions by half.
noxious emissions (=harmful and poisonous)
The air is a toxic cocktail of exhaust fumes and noxious emissions from nearby factories.
vehicle emissions (=from cars, lorries etc)
California has introduced tough new standards for vehicle emissions.
industrial emissions (=from factories)
The trees are being killed by acid rain and other industrial emissions.
sulphur dioxide/carbon dioxide/greenhouse gas etc emissions
The treaty calls for a 30% reduction in sulphur dioxide emissions.
verbs
cut/reduce emissions
an agreement to cut emissions of gases which contribute to global warming
control/limit emissions
The measures to control carbon dioxide emissions do not go far enough.
Examples from the Corpus
e·mis·sion nounn COLLOCATIONS1
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