emission: [noun] an act or instance of emitting : emanation. publication. a putting into circulation.

An emission is something that has been emitted —released or discharged. In general, emissions consist of things like gas, liquid, heat, sound, light, and radiation. Emissions can come from …

emission noun ENVIRONMENT uk / ɪˈmɪʃ ə n / us [ C, usually plural ] an amount of something, especially a gas that harms the environment, that is sent out into the air: emissions of sth The …

emission ( ɪˈmɪʃən) n 1. the act of emitting or sending forth 2. (General Physics) energy, in the form of heat, light, radio waves, etc, emitted from a source 3. a substance, fluid, etc, that is emitted; discharge 4. (General Physics) a measure of the number of electrons emitted by a cathode or electron gun: at 1000°C the emission is 3 mA.

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The act of sending out; a throwing out; as, the emission of heat from a fire. A discharge; referring usually to a seminal discharge occurring during sleep. 1920 - A practical medical dictionary. Throwing out; ejaculation, as of semen.

emission line: [noun] a bright line in the emission spectrum of a gas or vapor — compare absorption line.

carbon emissions definition: 1. carbon dioxide that planes, cars, factories, etc. produce, thought to be harmful to the…. Learn more.

The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an atom or molecule making a transition from a high energy state to a lower energy state. Atomic Spectra Absorption Spectrum Hydrogen Emission Spectrum Hydrogen Transitions Atomic Spectra

Greenhouse gas emissions from human activities strengthen the greenhouse effect, causing climate change.Most is carbon dioxide from burning fossil fuels: coal, oil, and natural gas.The largest emitters include coal in China and large oil and gas companies, many state-owned by OPEC and Russia.Human-caused emissions have increased atmospheric carbon dioxide by …