He throws gas on the fire.

He had thrown gas on the fire.

He is throwing gas on the fire.

Carbonic acid gas is produced when carbon dioxide dissolves in water.

The production of natural gas liquids has increased in recent years.

Inert gas narcosis can occur when divers breathe in nitrogen at high pressures.

The behavior of a van der Waals gas can be described using the van der Waals equation.

My friend's last name is Gaede.

The Gaedes are a group of talented musicians.