CO is produced whenever a material burns. Homes with fuel-burning appliances or attached garages are more likely to have CO problems Common sources of CO in our homes include fuel-burning appliances and devices such as: Clothes dryers. Water heaters, cars, gas stoves, generators, and power tools
They can be legitimate or excuses. If a person genuinely can’t bench 50 pounds because they’re not strong enough to lift the bar that’s barrier but if someone can do something such as run on the treadmill for 5 minutes but just don’t want to that’s an excuse.
Because it looks nasty to them so they don’t wanna risk trying it and not liking it so they just throw it away.