Gas leaks can pose serious risks to your health and safety. As a source of natural energy, a gas leak can become dangerous and life-threatening if left undetected or improperly handled. In this article, weÒ€ℒll walk you through all the best ways to detÒ€¦ see if your home has a rotten egg or sulfuric smell. natural gases from your appliances have the added chemical mercaptan, making the gas have an unpleasant odor so you can detect it easier.