What’s Inside A Turtle Shell

Natural gas has no odor. The "smell" of natural gas is added so that it can be smelled. The chemical, methyl mercaptan or methanetiol, occurs naturally in bad breath, feces, things like that (and in small amounts in some natural gasses). In fact, if you've even smelled a strange smell in your urine after eating asparagus, you have smelled this chemical. So, it was chosen as an additive because our olfactory systems are incredibly sensitive to it!

In a city of about 50,000 residents, assuming the gas company printed 50,000 of these cards, the gas company wasted fifty per cent of these cards and tossed them out. If they were 25 cents apiece, then $6,250 was tossed out. That would pay my gas bill for about six years. Dang.