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Victor had been dealing with breathing issues, and she wonders whether the heavy smoke might have asphyxiated him.

She and others worry that it could be even trickier with CO2 — an odorless, asphyxiating gas.

That, in turn, causes them to “asphyxiate because their diaphragm has too much pressure on it.”

Gas stoves emit a variety of pollutants, including asphyxiating carbon monoxide, cancer-causing formaldehyde and benzene.

At least three inmates died after stuffing paper, sanitary napkins or other items down their throats, asphyxiating before anyone intervened.