ammonia

One day after it was reported that the NFL banned ammonia inhalants, the league clarified that while teams can no longer supply them, players can supply their own.

The ammonia gas irritates the nasal membranes, causing a reflex that increases breathing and heart rate.

Smelling salts - a pungent mix of ammonia, water and ethanol - are marketed as improving mental alertness or boosting energy.

Their theory is that the ammonia is absorbed by a vast body of water below .

In comparison, the most environmentally friendly fuels like e-kerosene and ammonia are created from initially splitting water atoms to obtain hydrogen, which is a very energy-intensive and costly process.