Taking away a city’s rubbish is a big job.Every day trucks come into a city to collect it.Most rubbish is made up of things we can’t eat or use.If we kept these things we would soon have a mountain of rubbish.
In some cities the rubbish is collected and taken outside of the city to a dump(垃圾站).Often the city dump is placed where the ground is low or there is a big hole.The kitchen rubbish is broken into small pieces and sent into the sewage system.The sewage system takes away the used water from toilets,bathtubs(澡盆) and other places.
To keep mice and flies away,some earth is used to cover the newly dumped rubbish.Later,grass may be planted on the rubbish-filled land.Finally,a house or a school may be built there,and then you’d never know that this had once been an old rubbish dump.
In other cities the rubbish is burnt in special places.The fire burns everything but the metal.Sometimes the metal can be used again in factories where things are made of metal.The food parts of rubbish are put in special piles where they slowly change into something called humus(腐殖土),which looks like black earth.It is rich with kinds of things that feed plants and help make them grow.
取走一個(gè)城市的垃圾是一個(gè)大的工作.每天都進(jìn)入了一個(gè)城市的卡車來(lái)取它.大多數(shù)垃圾是由東西我們不可以吃或者使用.如果我們保持這些我們很快就會(huì)有一大堆垃圾.
在一些城市的垃圾被收集起來(lái)并離開(kāi)城市陷入了垃圾場(chǎng)(垃圾站).通常這個(gè)城市垃圾場(chǎng)被放置在地上很低或有一個(gè)大洞.廚房里的垃圾破碎成小塊,送進(jìn)污水排放系統(tǒng).奪去的污水處理系統(tǒng)所采用的水從廁所、浴缸(澡盆)和其他的地方.
保持老鼠和飛走了,一些地球是用來(lái)蓋住新傾倒垃圾.后來(lái),草可以插在rubbish-filled土地.最后,一幢房子或是一所學(xué)?？赡軙?huì)建在那里,然后你就不會(huì)知道,這曾經(jīng)是一個(gè)古老的垃圾堆.
在其他城市垃圾是燒在特殊的場(chǎng)所.火燒傷幾乎把所有的金屬.有時(shí)金屬能夠再使用在工廠,那里的東西都是用金屬做的.垃圾食品的部分,在那里他們放在特殊樁慢慢轉(zhuǎn)變成一種被稱為腐殖質(zhì)(腐殖土),這就像黑色的大地發(fā)出的渴望的聲音.它包含著為食的植物種類的東西,幫助他們成長(zhǎng).