I can't rest easy when he doesn't come home.

This lake is known as a dangerous body of water.

This information is enough.

Please use the emergency stairs in case of a fire.

Due to the earthquake, the city declared a state of emergency.

Noble gases are known for not participating in chemical reactions.

In this area, there is a shortage of noble gas supply.

Our house is heated with natural gas.

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

Methane gas is one of the causes of global warming.