久久亚洲国产成人影院-久久亚洲国产的中文-久久亚洲国产高清-久久亚洲国产精品-亚洲图片偷拍自拍-亚洲图色视频

US EUROPE AFRICA ASIA 中文
Opinion / Op-Ed Contributors

Environmental footprint of China's food security policies

By Cecilia Tortajada (Chinadaily.com.cn) Updated: 2015-06-04 14:50

As the World Environment Day approaches, it is appropriate to assess the impacts of food and agricultural production on the environment both in China and on some of the countries from which it imports its food.

Policies for food security in China have called for basic self-sufficiency in grains and absolute security in staple grains such as wheat and rice. These policies have had, and will continue to have, significant implications on the environment, mostly in terms of land and water, both within China and also on the countries from which such products are sourced. These are United States, Brazil, Australia, Canada, New Zealand, and Argentina.

To respond to its internal growing food needs, China has become the largest trader of agricultural products globally, with imports totaling $1.9 billion in 2013. Internal demands have increased for wheat and soybean oil; cotton and wool fibers as raw material for textile manufacturing; meat and dairy products, etc. Soybeans, other oilseeds and fats and oils represent nearly half of the country’s agricultural import value and are expected to increase significantly in the future.

According to Cofco, China’s State-owned grain trader, the country′s global farm imports would increase from 120 to 200 million tons within a decade because of changing dietary preferences of an increasingly affluent population that demands more meat and dairy products.

In China, agriculture has also had many environmental and health impacts. The excessive use of chemicals such as fertilizers and pesticides has made it a major contributor to soil and water pollution, especially due to leaching of nitrogen and phosphate. Problems can be seen in many places Groundwater levels have increased in many areas because of seepage from irrigation and drainage. This has increased soil salinity and made land less productive.

The Yangtze basin, a region of paddy production, has suffered serious problems of contamination for decades. These include severe contamination with pyrethroid, organosphosphorus and carbamate pesticides, which could be carcinogenic. In Taihu Lake, increasing levels of phosphorus due to agricultural, domestic and industrial discharges have resulted in serious eutrophication and nitrate contamination. They have seriously deteriorated quality of drinking water for over one million people. In Yellow and Huai rivers, major areas for corn, cotton, soybean and wheat production, high concentrations of products toxic to humans and wildlife have been noted such as amides and triazines pesticides.

Previous Page 1 2 Next Page

Most Viewed Today's Top News
...
主站蜘蛛池模板: 成 人 黄 色 免费网 | 国产l精品国产亚洲区久久 国产tv在线 | 欧美成人私人视频88在线观看 | 国产三级在线 | 亚洲在线免费观看 | 成年人免费看 | 欧美透逼视频 | 男女男精品视频网站 | 亚洲成年网站在线观看 | 怡红院亚洲红怡院天堂麻豆 | 午夜国产亚洲精品一区 | 亚洲高清在线看 | 一级做a爰性色毛片免费 | 亚洲在线观看视频 | 亚洲欧美自拍一区 | 天天综合色一区二区三区 | 一区二区三区在线免费观看视频 | 俄罗斯一级黄色片 | 国产精品国产三级国产普通 | 精品国产品香蕉在线观看 | 成人黄激情免费视频 | 国产男女爽爽爽爽爽免费视频 | 欧美成人亚洲高清在线观看 | 花蝴蝶在线 | 亚洲精品14p | 成人国产综合 | 91pao强力打造免费高清 | 免费精品国产日韩热久久 | 久久久久久久久毛片精品 | 中文字幕在线观看国产 | 久9青青cao精品视频在线 | 国产免费亚洲 | 国产精品爱久久久久久久 | 在线视频 日韩 | 国产爽的冒白浆的视频高清 | 久久中文字幕免费视频 | 亚洲偷偷自拍 | 精品一区二区三区波多野结衣 | 免费a级在线观看播放 | 午夜限制r级噜噜片一区二区 | 一级片成人 |