In urban areas, smog has become a serious problem.

It is said that smokers have a higher health risk compared to non-smokers.

I bought fresh fruits at the souq.

If you use this spray, your hair will become silky smooth.

He sprayed his hair.

Nitrous oxide, also known as laughing gas, is used for anesthesia.

This contract prohibits interference by a third party.

Trolley buses are very convenient as a means of urban transportation.

Electromagnetic radiation conveys energy in forms such as light and radio waves.

My father drives a truck.