| 词汇 | emission |
| 释义 | emission noun uk /iˈmɪʃ.ən/ us /iˈmɪʃ.ən/ C1[ U ] the act of sending out gas, heat, light, etc.: （气体、热量、光线等的）排放，散发，射出 Bioluminescence is the emission of light from living organisms. Excess infrared emission was detected around six of these stars. C1[ C ] an amount of gas, heat, light, etc. that is sent out: 排放物;散发物 He uses a night observation device that picks up heat emissions. There is a risk of accidents with large emissions of radioisotopes into the biosphere. [ Cusually plural ] environment specialized an amount of a substance that is produced and sent out into the air that is harmful to the environment, especially carbon dioxide: Reducing the consumption of energy and increasing its efficient use would help control emissions. These health risks are caused by vehicle emissions. The agreement aimed to half the emissions rate in 50 years. We can measure the absorption or emission of light at specific wavelengths. Fluctuations in the intensity of the radio emissions from stars allow researchers to infer the amount of ejected material. Research is underway to develop ways of measuring the full-body biophoton emissions of human subjects. He has concerns about the need to curb emissions of smog-forming nitrogen oxides, sulphur dioxide and mercury. Countries and corporations are making efforts to cut their greenhouse gas emissions. Vehicles are placed on a treadmill and their emissions are measured when the gas pedal is pushed and the wheels are turning. State governors are moving toward regional emissions limits. New, tougher emission standards for cars will be brought in. Emitting and ejecting carbon emissions discharge displace displaced displacement eject ejection ejector emitter expel expulsion exude give something off loose send send something out shed shedding spew toss You can also find related words, phrases, and synonyms in the topics: Physical & chemical processes Environmental issues emission | Business Englishemission noun ENVIRONMENTuk /ɪˈmɪʃən/us [ C,usually plural ] an amount of something, especially a gas that harms the environment, that is sent out into the air: emissions of sthThe bill is intended to lower emissions of greenhouse gases. cut/reduce/limit emissionsMany countries are reluctant to cut emissions if it means sacrificing economic growth. emission cuts/reductions/control California's emissions standards would cut global warming emissions nearly 30% by year 2016. [ U ] the act of sending gas, heat, light, etc. out into the air: Hybrid vehicles reduce the emission of pollutants by about 20%. Examples of emissionemission There is an interesting look at emissions trading, which is going to take an increasing role and for which biological sinks may be significant. Above it is assumed that quotas are allocated according to emissions. The marginal costs of carbon dioxide emissions and the returns to investment in development are readily compared. We estimate the marginal cost of reducing carbon emissions beyond the existing baseline. We may also say that the adjustment of emissions is effected within almost three periods. Option values are attached to the three possibilities: to stop emissions temporarily, to exit entirely and to re-start polluting (for an 'entry fee'). However, emissions are not necessarily the most relevant measure of (subjective) environmental quality. Note that particulate emissions from the chemical plant are significantly higher than emissions from the iron foundry. Therefore, in terms of social costs of abatement an emissions tax is as efficient as a standard. At this tax rate, there is nearly 96 per cent reduction in emissions on average with a cost increase of less than 50 per cent. The firms do make efficient choices under an emissions tax. The plants choose low-ash coal to abate particulate emissions. The policies that are considered include an emissions standard, an emissions tax, an ash tax, and a coal tax. An emissions tax induces efficient allocation of abatement across firms, even when all the firms are different and some firms abate more than the others. If we consider first an emissions standard, then the switch to a baghouse depends on plant-specific standards. See all examples of emission These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Collocations withemissionemissionThese are words often used in combination with emission. Click on a collocation to see more examples of it. carbon emission The policy goal is to reduce the 2010 total carbonemission to 90 per cent that of 2000. emission allowance With a personalised carbon dioxide emissionallowance it is apparent that the third world would benefit at the expense of the developed world. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 emission line Measurements of the carbon emissionline shape are therefore used to extract values for the impurity ion temperature and velocity. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. 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