Where does “bag gas” come from?

bag gas (English) comes from English bag, from Middle English bagge, from Old Norse baggi, from Proto-Indo-European bʰak-.

bag gas (English): Natural gas for use as fuel in the home which has been stored in an inflated plastic bag as form of improvised storage device, with the bag being disconnected and refilled as needed; especially such gas which has to be carried some distance back to the home in the bag

Definitions

Natural gas for use as fuel in the home which has been stored in an inflated plastic bag as form of improvised storage device, with the bag being disconnected and refilled as needed; especially such gas which has to be carried some distance back to the home in the bag

Ancestry of “bag gas”, step by step

bag gas traces back through two separate lines of ancestry.

via English bag

Step	Language	Word	Meaning
1	English	bag	A flexible container made of cloth, paper,...
2	Middle English	bagge	A fabric container; a bag, sack, pouch, purse, or...
3	Old Norse	baggi	bag, pack, satchel, bundle
4	Proto-Indo-European	bʰak-	—

via English gas

Step	Language	Word	Meaning
1	English	gas	Matter in a state intermediate between liquid and...
2	Dutch	gas	gas; liquefied petroleum gas; unpaved street

Every word from Proto-Indo-European bʰak- →Every word from Old Norse baggi →Every word from Middle English bagge →