Our house is heated with natural gas.

Mustard gas is a type of chemical weapon and is very dangerous.

Are you really not going to use this unused laptop?

He is the most competent employee of our company.

Who is the user of this software?

This bottle is reusable.

Fergus is my best friend.

This factory has significantly reduced its carbon dioxide emissions.

Fougasse is one of my favorite types of bread.

The police used tear gas against the demonstrators.