Like the Romans used to drink from lead cups. Something like that.
(it appears that the moderator is removing any replies with which he disagrees. It might be a piefed issue. But all the removed replies are top level and upopular. Stranger coincidences have happened I suppose.)
Well I was just talking about air quality, but if we want to talk about fire safety, the stats may surprise you.
In the U.S., where I live, electrical malfunctions cause about 3 times as many fires as flammable gases.
Now, not every house has gas lines, so the denominator might be different, so it’s probably not 3x the risk, but I think you’d have to do more analysis before you could conclude that gas lines are more dangerous than electrical lines.