Three measures to limit noise pollution in the city are:

⇒ Silencing devices must be installed in air craft engines, vehicles, machines etc.

⇒ Use of horns must be minimized.

⇒ T.V. and music system must be run at low volumes.

⇒ The industries which produce excessive noise should be set up far away residential areas.

⇒ Trees must be planted along the roads and around the buildings.

(Any three)