After 30 seconds slowly lower your body forward and to the outside of your left leg, keeping your left arm fairly straight as you do. When you reach your lap remain there for another 10 seconds, release the pressure but rest there for another 30 seconds. Then reverse your hand positions and do your right side.
Inhaling a high concentration of natural gas can lead to asphyxia, the symptoms of which include fatigue and chest pain. Asphyxia occurs when your body is deprived of oxygen, and the more carbon monoxide there is present in the air, the less oxygen you'll be able to inhale, which can potentially kill you.
But, it can also be used in place of petroleum to power vehicles. The two main byproducts of natural gas combustion are carbon dioxide and water vapor, making it an extremely clean fuel when compared to coal and petroleum, which have higher carbon dioxide emissions, in addition to other harmful byproducts.