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We show an amazing tolerance for a form. of pollution that is a growing problem: noise. Airplane traffic is increasing by five percent a year. Urban noise is doubling every ten years. By air， land and sea， we are facing an onslaught of noise that is threatening our ability to live in this world.
We have granted ourselves the right to make noise. But what about our responsibilities？ Have we developed a sense of acoustic responsibility？
The evidence suggests that we have not. Many people seem to believe they have an unlimited right to make noise with cars and motorbikes， and with loud music at home and in the street. In some countries measures have been taken to force people to make less noise. In Britain， for example， a law has been passed preventing people from disturbing their neighbors with music at night.
It is widely accepted that we should deal with our rubbish in a responsible way. Noise is in reality a particularly insidious （潜在的） form. ofrubbish. It destroys community life， pursues us into our homes， keeps us from sleeping and is the cause of many stress-related illnesses， as well as hearing loss.
Our acoustic environment belongs to all of us. Everyone has the right to use it， but no one has the right to abuse it. Let"s start using it responsibly.
The level of noise produced in cities and towns________. 查看材料
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战后苏联错失的三次改革机遇？
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苏联模式社会主义失败的历史教训？
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Shoes are outer coverings for the foot. They have soles， and most have heels. The upper part of most shoes extend no higher than the ankle. Boots are footwear that reach beyond the ankle. People wear shoes to protect their feet from harsh weather， sharp objects， and uncomfortable surfaces. Shoes are also an important part of people"s clothing. As a result， fashion often determines the style. of shoes that individuals wear. The desire to be fashionable has led to many unusual shoe styles. In the 1300"s，many European men wore shoes called crackowes， which had an extremely long toe. From the 1300"s to the 1700"s， some European women wore shoes with really thick soles causing walking to be virtually impossible without support. Shoes once worn in the Orient were connected to a stilt（高跷） as high as six inches.
Traditionally， most shoes are made of leather. But many other materials are now used. Including canvas， velvet， and synthetic substances such as plastics. Footwear materials and style. vary somewhat，depending on climate， custom， or other differences. Farmers in Netherlands often wear heavy wooden shoes that protect their feet from the damp environment while Japanese wear shoes outside their home but prefer soft slippers at home. In fact， people in some regions often wear foot coverings other than shoes. Some wear sandals during the hot summer and switch to warm boots for the cold winter.
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