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Discover LudwigThe phrase "concentrations are" is correct and usable in written English.
You can use it whenever you are discussing a particular concentration of something. For example: "The oxygen concentrations are higher at the surface of the lake than in the deeper parts."
Exact(60)
Higher concentrations are difficult to achieve before unconsciousness intervenes.
Concentrations are still one step removed from direct human control.
If the concentrations are too high, even the metal will have to be thrown out.
Among the highest concentrations are Spanish; Gujarati, an Indian language; Cantonese; and Arabic.
The CO2 concentrations are driving what appears to be runaway climate change around the world.
Such levels can sometimes be found in fields but concentrations are usually below 10ppb.
The living planet is signaling very clearly that current greenhouse gas concentrations are already too high.
We're just coming off the third decadal peak, and atmospheric concentrations are rising faster than ever.
All concentrations are nominal.
Ion concentrations are also calculated.
Concentrations are reported in millimolar units.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com