What did a gas leak smell like?
Rotten Egg Smell Natural gas and propane have a distinctive smell for a reason. For safety purposes, utility companies use an additive called mercaptan that gives the colorless and odorless gases a smell that is hard to miss. Most people describe this smell like something like rotten eggs, sewage, or sulfur.
Can gas smell harm you?
Perhaps one of the greatest risks of gasoline exposure is the harm it can do to your lungs when you inhale its fumes. Direct inhalation can cause carbon monoxide poisoning, which is why you shouldn't run a vehicle in an enclosed area, such as a garage.