I’m not sure exactly when this PSA dates from, but I’m guessing sometime in the 30s or 40s. Produced by the California State Fire Marshal, it’s a helpful (albeit a bit goofy) guide to the dangers plaguing homeowners in California’s booming suburbs.What’s weird is how far removed many of us are from any of these dangers. A woman sticks a penny behind a blown house fuse to turn the lights back on. Wait, what’s a fuse? What, for that matter, is a penny? Or when was the last time you legitimately worried about a frayed lamp cord, or had to splice a few electric cords together? And cleaning your clothes with gasoline? When was the last time you were ever more than a short drive away from dry cleaner?They’re all questions that, thanks to the improvements of modern living and a super-specialized economy, are only becoming more common. I doubt as many people keep kerosene and paint thinner stashed around the house as they did 80 years ago, and I’m sure no one is cleaning clothes with gas near an open flame. But all that aside, I have to ask: What hidden death is lurking around our homes now?Follow Derek Mead on Twitter: @derektmead.