emission
C1Formal, Technical, Academic
Definition
Meaning
The act of sending out or releasing something, especially light, heat, sound, gas or radiation.
A substance, especially gas or radiation, that is sent out into the air; the act of producing or giving out something abstract (like a sound or a feeling).
Linguistics
Semantic Notes
Primarily a noun related to the process or result of emitting. Used in both concrete (CO2, light) and abstract (sound, aura) contexts. Often has negative environmental connotations in modern usage.
Dialectal Variation
British vs American Usage
Differences
No major spelling or usage differences. Both prefer the spelling 'emission'.
Connotations
Identical; heavily associated with pollution, energy, and environmental policy.
Frequency
Comparably frequent in both dialects due to shared technical and environmental discourse.
Vocabulary
Collocations
Grammar
Valency Patterns
emission of [gas/light]emission from [source]emission by [country/industry]emission into [atmosphere/environment]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “[something is] on an emission-free footing”
- “zero-emission zone”
- “emission trading scheme”
Usage
Context Usage
Business
Refers to corporate carbon reporting, ESG (Environmental, Social, and Governance) metrics, and regulatory compliance.
Academic
Used in environmental science, physics, and engineering papers to quantify pollutants or energy radiation.
Everyday
Most commonly heard in discussions about car exhaust, air quality, and climate change.
Technical
Precise measurement of gases/particles from a source; spectral lines in astrophysics.
Examples
By Part of Speech
verb
British English
- The new regulations will force all lorries to emit less particulate matter.
- Old boilers can emit dangerous levels of carbon monoxide.
American English
- The new regulations will force all trucks to emit less particulate matter.
- Old furnaces can emit dangerous levels of carbon monoxide.
adverb
British English
- The engine performed emission-wise within the legal limits.
- This model is designed more emission-efficiently.
American English
- The engine performed emissions-wise within the legal limits.
- This model is designed more emissions-efficiently.
adjective
British English
- They are trialling a new emission-free bus route in the city centre.
- The emission-control device needs servicing.
American English
- They are trialing a new emission-free bus route in downtown.
- The emissions-control device needs servicing.
Examples
By CEFR Level
- Cars cause a lot of emissions.
- The light emission was very bright.
- The government wants to reduce carbon emissions from factories.
- There are strict laws about vehicle emissions.
- Measuring greenhouse gas emissions is crucial for climate treaties.
- The emission of alpha particles was detected in the experiment.
- The company's latest sustainability report details a 15% reduction in Scope 1 and 2 emissions.
- Spectrographic analysis revealed an anomalous emission line from the distant nebula.
Learning
Memory Aids
Mnemonic
Think of a car's **exhaust mission**: its mission is to EMIT, hence EMISSION.
Conceptual Metaphor
ENVIRONMENT IS A BODY (emissions are its exhalations/waste); POLLUTION IS A BURDEN (emissions load the atmosphere).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating as 'эмиссия' (which is primarily for money/bonds). Use 'выброс(ы)' for gases/pollution, 'испускание' or 'излучение' for light/radiation.
- Do not confuse with 'emotion' (эмоция).
Common Mistakes
- Pronouncing as /iːˈmɪʃən/ (long 'e'); correct is short /ɪ/.
- Using as a verb (*'The factory emissions a lot of smoke'); correct verb is 'emit'.
- Confusing 'emissions' (plural, the substances) with 'emission' (the process).
Practice
Quiz
In which context is 'emission' LEAST likely to be used?
FAQ
Frequently Asked Questions
The verb is 'to emit'. 'Emission' is the noun for the act or the substance that is emitted.
No. 'Emission' (singular) refers to the process or a single instance of emitting. 'Emissions' (plural) typically refers to the substances released, especially pollutants (e.g., carbon emissions).
'Emission' is the broader act of releasing or sending out *anything* (gas, light, sound). 'Radiation' specifically refers to energy emitted as waves or particles (e.g., heat, X-rays). All radiation involves emission, but not all emissions are radiation.
It is hyphenated when used as a compound modifier before a noun (e.g., 'zero-emission vehicle') to clarify that the words work together as a single concept describing the noun. It's often not hyphenated after a verb (e.g., 'The target is zero emission').
Collections
Part of a collection
Environment
B1 · 47 words · Nature, ecology and environmental issues.