emission
ee-MISH-un
/ɪˈmɪʃn/
The production and discharge of something, especially gas or radiation.
In environmental contexts, it specifically refers to greenhouse gases released into the atmosphere from industrial or natural processes.
The story behind the word. The word comes from the Latin 'e-' (out) and 'mittere' (to send). Historically, it was used for anything sent forth, from light to smells, but in the 20th century, it became the standard term for industrial pollutants.
Word relationships
- discharge: Discharge is more general and often refers to liquids or waste into water.
- absorption: Absorption is the taking in of a substance, whereas emission is the release.
Commonly confused with
- effluent: Effluent specifically refers to liquid waste or sewage discharged into a river or the sea.
Word family
- emit (verb): To produce and discharge something.
- emitter (noun): A person or thing that emits something.
Collocations
- carbon emissions
- zero emissions
- emission standards
Example sentences
- "The emission of greenhouse gases from human activities is the primary driver of climate change." Scientific reporting on global warming.
Memory hook
Think of an 'E-mission' as a 'Mission' to send something 'E-xternal' (out). Sending out gas.
When not to use
Avoid using it for liquid spills; use 'leak' or 'discharge' instead.
Fun facts
- The term was once used in physics to describe the release of electrons from a surface.
Related words
Explore more words
pollutant, effluent, output, mitigation, footprint, production
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