Crossword puzzle clue "marsh gas mostly"

Here are the possible solutions for marsh gas mostly clue

Answer
Clue
Relevancy
methane
Clue
Marsh gas, mostly
Swamp gas, mostly
Marsh gas
Marsh gas, essentially
Marsh gas, mainly
Marsh gas constituent
Definition
a colourless odourless flammable gas, CH4, the simplest of the alkanes
neon
Clue
Gas in gas station signs
Definition
a gaseous element
aaoe
Clue
They're mostly in the Pacific

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