Homes are heated with communal hot water, wood gassification (pellet burners), heat exchange with the ground or deeper bore-holes, or electricity. Not much gas, heating oil was gone by the 80's sometime.

This might be because no one in Sweden knows what “residential natural gas” is. I haven’t heard about anyone heating their house with natural gas. Residential gas is used for gas stoves in some old (exclusive) areas of stockholm. Oil used to be a thing but these days it’s usually electric (heat pump) or geothermal.

This demonstrates the danger of assumptions. As others have commented, "residential natural gas" simply isn't a thing in the Nordics.

And how fearful people are of depending on Russia.