Crossword puzzle clue "it's roughly 21 oxygen"

Here are the possible solutions for it's roughly 21 oxygen clue

Answer
Clue
Relevancy
air
Clue
It's roughly 21% oxygen
Definition
the mixture of gases breathed by people and animals, also AYRE
aer
Clue
Oxygen: Prefix
aerate
Clue
Supply with oxygen
Infuse with oxygen
Supply oxygen to
Supply oxygen through respiration
Supply oxygen
Pump in oxygen
Definition
to put air into

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