We will use rare gases in this experiment.

The gas pump is broken, so I can't put gas in the car.

The gas pipe is broken and gas is leaking.

Poison gas is leaking from that factory.

I used a gas burner in a chemistry experiment.

He is traveling around the world as an ecologist.

We must strive to protect the natural environment.

We should recycle to prevent environmental pollution.

We need to solve the problem in the production environment.

It took a long time to set up the development environment.