日韩精品久久一区二区三区_亚洲色图p_亚洲综合在线最大成人_国产中出在线观看_日韩免费_亚洲综合在线一区

您現在的位置: > Language Tips > Audio & Video > Special Speed News  
 





 
Two new designs to help the poor countries
[ 2006-12-31 09:58 ]

This is the VOA Special English Development Report.

Today we tell you about the LifeStraw water-purifying device. Then learn about a wood-burning cookstove that scientists hope will reduce the loss of forests in poor countries.

The LifeStraw is a thick plastic tube 25 centimeters long. You place one end into water and drink from the other. The water passes through a series of filters to catch extremely small particles. Iodine and active carbon are also used in the cleaning process. It all takes about eight minutes for one liter.

The maker of the LifeStraw says it kills organisms that spread diarrhea, dysentery, typhoid and cholera. The device filters most bacteria and parasites. But it has limits, including against viruses. Also, it does not remove arsenic or other heavy metals from water.

The Vestergaard Frandsen Group, a Danish company with headquarters in Switzerland, invented the LifeStraw last year. The company makes disease-control textiles including malaria nets treated to kill mosquitoes.

The LifeStraw costs about three dollars. It can be worn on a string around the neck. It has a lifetime of up to 700 liters, or about one year. The first large shipments went to Pakistan after the earthquake last year.

The company notes that each day, worldwide, more than 6,000 children and adults die from unsafe drinking water.

Another problem in many poor areas is finding enough firewood to cook with. Forests can disappear as more and more trees are cut down.

Scientists have developed a cookstove that was tested in refugee camps in Darfur, Sudan. The scientists are from the Lawrence Berkeley National Laboratory and the University of California, Berkeley.

Two of them, Ashok Gadgil and Christina Galitsky, went to Darfur late last year. They found that many refugee families were missing meals for lack of fuel.

The light metal stove needs much less fuel than the traditional cooking methods used in the camps. This would mean less need for women to leave the camps to search for firewood and risk being attacked in violence-torn Darfur.

Since the visit, the researchers have improved the stove. Now they are trying to set up production. They estimate that the stoves could be built locally in Darfur for about fifteen dollars each. They say about 300,000 are needed. The hope is to begin producing 5,000 stoves by the end of the year.

And that's the VOA Special English Development Report, written by Jill Moss. I'm Steve Ember.

water-purifying device : 水凈化設備

點擊進入更多VOA慢速


(來源:VOA  英語點津姍姍編輯)

 
 
相關文章 Related Stories
 
Waltzing pumps up heart patients Red meat links to higher risk of breast cancer
         
 
 
 
 
 
         

 

 

 
 

48小時內最熱門

     

本頻道最新推薦

     
  Trends of America in this year
  Healthier eating in NY hard for some to swallow
  College costs in US: tuition, housing ...
  Family, friends, bid former President Ford farewell
  The Lake House《觸不到的戀人》(精講之三)

論壇熱貼

     
  i want to have a english name
  “早生貴子”英語怎么說
  日??谡Z趣味翻譯(It's fun!)
  how to say "彩鈴" in English?
  “天壤之別”英語怎么說?
  翻譯:老鄉見老鄉,兩眼淚汪汪




主站蜘蛛池模板: 大ji巴好好爽好深网站 | 欧美久久一区二区三区 | 精品国产一区二区在线 | 天天插天天狠天天透 | 亚洲午夜精品一区二区 | 久久中文字幕在线 | 亚洲一区二区三区久久精品 | 精品一区二区三区久久 | 一区二区欧美视频 | www.久久| 成片在线看一区二区草莓 | 欧美日韩精品一区二区在线线 | 国产WW久久久久久久久久 | 国产在线精彩视频 | 天天久久 | 女人色毛片女人色毛片中国 | 性XXXX18精品A片一区二区 | 日韩亚洲人成网站在线播放 | 国产美女自卫慰视频福利 | 免费午夜视频 | 国产福利资源在线 | 色综合中文字幕 | 天天视频网站 | 久久中文字幕一区 | 久久久国产一区二区三区 | 国内精品伊人久久久久7777人 | 国产传媒网址 | 欧美日批视频 | 一级三级黄色片 | 国产婷婷| 日本一级特黄视频 | av毛片免费看 | 国产精品久久久久久久久久久久 | 欧美成人精品一区二区男人看 | 日韩在线高清 | 国产 高清 在线 | 成人日韩在线观看 | 99r精品在线 | 亚洲午夜一区 | 欧美高清18| 欧美一区二区视频 |