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In today's world, almost everyone knows air pollution is harmful to people's health.
現在，幾乎所有人都知道空氣污染對人類的健康有害。
However, not all people know noise is also a kind of pollution and is harmful to humans' health.
但是，并不是所有人都知道噪音也是一種污染，而且對人體有害。
People who work and live in noisy conditions often go deaf.
在嘈雜環境下工作和生活的人會失聰。
For example, many of the workers who print newspapers and books lose their hearing.
比如，很多印刷報紙和書籍的人都失去了聽覺。
Quite a few people living near airports also have hearing loss.
住在機場附近的很多人也失去了聽覺。
Recently, it is reported that many teenagers in America can hear no better than 65-year-old people do, because these young people always listen to loud pop music.
最近，一篇報道稱美國很多年輕人的聽力跟65歲的老人一樣，因為這些年輕人經常聽音量很大的流行音樂。
Making a loud noise in public is also a kind of pollution.
在公共場合制造噪音也是一種污染。
It not only disturbs others but also does great harm to people's hearing.
這不僅會打擾別人，而且會對人們的聽力造成損害。
Cars and machines also produce too much noise.
汽車和機器也會產生很多噪音。
Such pollution makes people feel uncomfortable and unpleasant, and it can even cause them to become sick or deaf.
這種污染會讓人覺得很不舒服，心情不好，甚至會讓他們生病或失聰。
Nowadays many countries are trying to solve all sorts of environmental problems, including noise pollution.
現在很多國家都在設法解決各種各樣的環境問題，包括噪音污染。
