Reply to post: Re: ... start your vehicle and warm it up from inside the house on a cold day...

Re: ... start your vehicle and warm it up from inside the house on a cold day...

@Mage, your own link (correctly) says CO2 is not toxic.

Good job really, as https://en.wikipedia.org/wiki/Breathing#Composition says that your exhaled breath is 4% – 5.3% carbon dioxide