题干

  垃圾发电

填埋是目前全球垃圾处理的主要方式,传统的垃圾处理方式是将垃圾集中填埋,让其自行发酵。在发酵过程中会产生二氧化碳和甲烷等废气,易造成常规污染,还可能带来温室效应,甚至有爆炸的危险。

福州市红庙岭垃圾填埋气发电厂将垃圾填埋后,采用科学方法使其发酵,并把产生的填埋气收集起来用于发电。因此,垃圾填埋气和太阳能、风能一样,是一种可再生能源,不仅解决了垃圾填埋场安全和污染问题,也可产生显著的经济效益,同时减少温室气体的排放。

目前,我市垃圾填埋气发电厂和前期投产的垃圾焚烧发电厂的年总发电量大约可供4万个年用电量为2800千瓦时的家庭使用。

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    The fried foods, salty snacks and meat are major foods of the Western diet, which account for about 30 percent of heart attack risk across the world. Meanwhile, a diet rich in fruits and vegetables, the so called "Prudent" diet, can lower the risk of heart attack, according to a study.

    The research which looked at dietary habits in 52 countries, found people who ate a Western diet had a 35 percent greater risk of having a heart attack, compared to those who ate little or no fried foods and meat. Those who followed a "Prudent" diet had a 30 percent lower risk of heart attack, compared to those who eat little fruits and vegetables.

    The authors also looked at an "Oriental" diet, rich in tofu, soy and other sauces (酱类), and found it did not increase or decrease the risk of a heart attack.

    Previous studies have reached similar conclusions about the "Prudent" and Western diet in the United States and Europe, but did not include the Oriental pattern of eating. While some food of the Oriental diet may protect against heart trouble, the higher sodium (钠)content of sauces counter(抵消) that benefit.

    "This study indicates that the same relationships that are observed in Western countries exist in different regions of the world, "a professor of medicine at McMaster University said.

    Canadian researchers analyzed risk factors in food choices and the risk of heart attack in about 16, 000 people in 52 countries. Almost 6, 000 people had heart attacks, while the rest had no heart disease.