In urban areas, smog has become a serious problem.

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.

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.

He is wearing an undershirt.

The freight train passed through the station.