If you suspect a natural gas leak inside your home, stop everything, get everyone outside and call 911. Do not flip any electrical switches, unplug anything or use a telephone. A rotten egg odor is a signal that you have a natural gas leak. Gas suppliers add the noxious scent as a warning that there are harmful vapors in the air. Natural gas is a widespread energy source, but it is highly combustible. A natural gas leak can increase the risk of fire and explosion. Natural gas emits a byproduct of carbon monoxide. The more carbon monoxide in the air, the less oxygen you can inhale-possibly killing you. Remember: if you suspect gas a leak, get everyone outside and call the professionals, such as De hart Plumbing. De Hart Plumbing, serving Manhattan Kansas, Junction City Kansas and Wamego Kansas.