This generator is very efficient.

Please use the emergency stairs in case of a fire.

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

The existence of dark matter has not yet been fully proven.

Antibiotics don't work for colds, so please don't take them unnecessarily.

It is said that antimatter has properties opposite to those of matter.

This food may contain carcinogens.

The air in this area is greatly affected by pollutants emitted from factories.

We exist as a part of the material world.

He has a discerning eye, so he always chooses the highest quality wine.