It is 23,500 times more warming than carbon dioxide (CO2). Just one kilogram of SF6 warms the Earth to the same extent as 24 people flying London to New York return. It also persists in the atmosphere for a long time, warming the Earth for at least 1,000 years.

The conversion of wind energy to electricity does not release greenhouse gases and so does not contribute to global warming. Small amounts of greenhouse gases are released during the manufacturing and transportation of the wind turbines to their installation site.

A study published today claims that if the US generated enough energy from wind to meet its current electricity demand, the surface of the continental US would warm by 0.24°C. …

Sulfur hexafluoride is inert in the troposphere and stratosphere and is extremely long-lived, with an estimated atmospheric lifetime of 800–3,200 years.

Sulfur hexafluoride SF6 gas hazards Sulfur hexafluoride (SF6) is colorless, odorless, heavier than air and is not considered as toxic. Sulfur hexafluoride has no lower and upper explosive limits but can severely react with disilane and form a dangerous explosive gas mixture.

dielectric gas

Clean SF6 gas is an inert, stable, colorless, odorless, nontoxic, nonflammable gas. It is approximately five times heavier than air and will displace air in confined areas. SF6 gas contains no oxygen and will not support life.

To be more specific, it is one of the only non-poisonous gas heavy enough to make your voice lower than normal. Xenon, which is a noble gas, can also have the same effect on you but it is very rare and expensive. Other options would include Nitrous Oxide also known as laughing gas used by dentists during surgeries.

Nitrous oxide

The speed of sound is higher in hydrogen than helium, so yes it would make your voice even higher. Oh – and too much hydrogen can displace all the air and asphyxiate you too.