The main constituent of natural gas is methane.
The main constituent of natural gas is methane (CH4).
The main constituent of a pearl is calcium carbonate, which is deposited in concentric layers around an irritant within an oyster or mollusk. This substance gives pearls their luster and iridescence.
carbon
Methane
wheat
The main constituent of coal gas is carbon monoxide, along with hydrogen, methane, and other hydrocarbons.
Do you mean what is the MAIN constituent of butter ? If so I believe it is cows milk.
methane
methane
Plasma and water.
Europe