Looking at that person's behavior, I feel like they have some secret.

The police used tear gas against the demonstrators.

Fergus is my best friend.

This factory has significantly reduced its carbon dioxide emissions.

Fougasse is one of my favorite types of bread.

We need to replace the gasket of this engine.

He lost consciousness due to the effects of nerve gas.

He likes repairing old locomotives.

Reducing greenhouse gas emissions is important for environmental protection.

I decided to buy a used car.