Somg devices have drastically reduced CO emissions. My last smog check revealed almost no CO emissions whatsoever.
With todays auto engines it is extremely difficult to get enough CO in a garage to kill yourself anymore. You'd do a lot better by just running your one cylinder lawnmower than a big V-12 SUV.
Somg = SMOG
Now I know why I haven't heard lately of anyone committing suicide by locking themselves in a garage with the engine running.
I Thank God and Jim Robinson every day, because I learn something new everyday that I log into FR.
Thanks to you too, P-Marlowe.