What is noise pollution? Write its cause and ways to present it?

Hint: Unwanted or excessive sound which is harmful for human health and affects environmental quality and sound above 65 decibels are considered as noise pollution as per world health organization.

Complete answer:
The World Health Organization (WHO) defines noise above 65 decibels (dB) as noise pollution. To be precise, noise becomes harmful when it exceeds 75 decibels (dB) and is painful above 120 dB. As a consequence, it is recommended noise levels be kept below 65 dB during the day and indicates that restful sleep is impossible with nighttime ambient noise levels in excess of 30 dB.
The main causes of noise pollution are
-Traffic noise: a normal car honk produces 90dB noise you can guess in a normal busy road how much noise pollution are produced everyday, Traffic noise(including honk sound, engine sound and exhaust sound) contributes most of the noise in any city
-Aircraft traffic noise: There are fewer aircraft flying over cities than there are cars on the roads, but the impact is greater: a single aircraft produces 130 dB.
-Construction site: construction involves heavy equipments like drilling machine which produces very loud noise around 130dB
-Catering and nightlife: all those night clubs and djs which we enjoy while partying involves loud noise
-Animals: noise made by animals can go unnoticed, but a howling or barking dog, for example, can produce around 60-80 dB

Note: Practically its hard to prevent noise pollution but as a society if we build some habits we can definitely reduce noise pollution like when it’s not absolutely necessary we should not use honks of our cars,buses, we should attach sound absorber on heavy machineries ,instead of using big djs we should use headphones etc.