Editor’s note<\/p>
This is the second of a special three-part series of investigations jointly run by China Dialogue and Yale Environment 360<\/a>, with support from the Pulitzer Center on Crisis Reporting<\/a>. You can also read part one here<\/a>.<\/p><\/div><\/div>\n\n\n\n Rice-growing is a back-breaking and increasingly unprofitable occupation in China. Twelve years ago, Cao, like many small farmers, was obliged to supplement his income by working on construction sites in Guangzhou, the capital of neighbouring Guangdong province. Then it occurred to him that he could make more money by changing professions. He quit his job and returned home to You county to set up as a rice trader. As a trader, he works on behalf of state-owned companies within the government-controlled procurement system, buying rice for the national grain reserves at around the government guide price.<\/p>\n\n\n\n With two lorries and eight employees, business was good: in 2012 the country enjoyed a good harvest, and Cao enjoyed his best year. He bought 4,000 tonnes of grain that year, which made him the biggest trader in his hometown. But on May 16, 2013, food safety officials in Guangzhou announced that, of 18 samples of rice and rice products from Hunan Province, eight were heavily contaminated with cadmium, a heavy-metal that accumulates in the body and attacks the kidneys and other organs. Of the eight most contaminated samples, five had come from three rice mills in You county, where Cao\u2019s village is. Similar levels of the metal had been found in rice in February 2013, but it was the second discovery of widespread contamination that was to cement the reputation of Hunan\u2019s rice as dangerous<\/a>. Prices began to fall.<\/p>\n\n\n\n Rice that is not sold quickly decays, and decaying rice fetches lower prices. Local farmers could see that prices were falling, not just for rice but also for their other crops, but at first they did not connect it to the cadmium scandal. The rice traders lost less than the farmers, and Cao still made about 100 yuan (US$16) on every tonne of rice he sold. But, apprehensive about the effect of rice sales, he cut back sharply on the amount of rice he purchased through the year. <\/p>\n\n\n\n Cao still does not understand exactly how the rice came to be contaminated with cadmium, but he does know that the environment of his village is polluted. Hunan, known as China\u2019s granary, is a major rice-growing province, producing some 30 million tonnes a year, or around 15% of the total national crop. You county is one of the province\u2019s top four rice-growing counties, with more than 16,000 acres (995,000 mu<\/em>) of paddy fields under cultivation in 2012, and a harvest of 484,400 tonnes. With a growing population and a long established concern for national food security, the government encourages rice farmers in Hunan and other provinces to produce as much as they can.<\/p>\n\n\n\n But Hunan is also known for the non-ferrous metals mines that produce almost 50 million tonnes of waste a year. Waste-water from mining is frequently used to irrigate farmland, and mine tailings, which contain cadmium amongst other pollutants, tend to be poorly managed. It was cadmium from Hunan\u2019s mine waste that had leaked into the soil and contaminated the rice<\/a>. <\/p>\n\n\n\n When the scandal first broke, the You county government responded with denials. An official statement from the county government stated that there was no heavy metal mining within 10 kilometers of the source of the problem rice, but many say the pollution has been an open secret for years. <\/p>\n\n\n\n As early as 2006, the village of Xinma, in the same municipality, suffered an episode of mass cadmium poisoning in which two people died and 150 were left with lower-level chronic poisoning. More than 66 hectares of land (1,000 mu<\/em>) in Xinma and neighbouring villages had to be abandoned.<\/p>\n\n\n\n Yin Lihui, who heads the Hunan Agricultural Resources and Environmental Protection Station, admits that pollution from non-ferrous metal mining is particularly grave in the watershed of the Xiang River. The Economic Daily, <\/em>a national newspaper, has reported that the Xiang, Hunan\u2019s \u2018mother river\u2019, is the most polluted by heavy metals of all China\u2019s rivers. <\/p>\n\n\n\n A villager in Zhujiaqiao, who did not want to give his name, said that there used to be a number of small heavy-metal smelting workshops and zinc oxide plants in the district, and villagers familiar with zinc oxide production recall that sludge containing copper and cadmium is a by-product of the production process. The companies that operated in Zhujiaqiao simply dumped the sludge, he said. You county\u2019s environmental protection officials point out that the county spent 20 million yuan (US$3.2 million) in 2012 alone, and closed down 24 heavy-metal plants. Although the government has closed the factories, toxins from that sludge still leach into the soil with each shower of rain.<\/p>\n\n\n\n In November 2010, the China Geological Survey investigated soil conditions in the Yellow River Basin, the Northeast Plains and the Yangtze River Basin, collecting more than two million samples and analysing 600,000 composite samples. They found that the municipality of Zhuzhou, which includes You county, had the highest level of cadmium pollution in China: more than 160 square kilometres (62 square miles) of the land tested had levels five times the permitted limit. <\/p>\n\n\n\n Since the start of the 10th Five-Year Plan in 2001, Hunan has been the country\u2019s largest source of mercury, cadmium, chromium and lead, and, next to Gansu province, the second largest source of arsenic pollution. According to official figures, nearly 28,000 square kilometres (11,000 square miles) of land in Hunan, 13% of the total area of the province, has been polluted by mining waste and heavy metals.<\/p>\n\n\n\n In comparison to many richer, coastal areas, You county is relatively poor and depends on coal and iron mining, in addition to minerals. In 2012, just as the scale of contamination became clear, local revenues in You county were also hit by falling prices for iron and coal. The previous year, the city government had begun a 40-billion yuan (US$6.4 billion) trial cleanup of the most polluted area, Qingshuitang, which had suffered from many years of smelting and chemical production.<\/p>\n\n\n\n The river bed at Laoxia Harbour, not far from the waste-water outlet at Qingshuitang in Zhuzhou, was found to have cadmium levels 1,800 times the limit specified in China\u2019s soil environmental quality standard. Lead levels were 52 times the limit. Laoxia Harbour had been home to a number of companies that produced zinc oxide and zinc sulphate, companies that discharged their waste water directly into the Xiang River. The local government\u2019s clean-up programme included efforts to prevent further pollution, treat contaminated land and relocate affected villagers.<\/p>\n\n\n\n In early 2012, the provincial government started to investigate cadmium pollution of paddy fields. It selected varieties of rice that seem to absorb smaller quantities of the metal, and researched methods of deactivating cadmium in the fields and rapidly detecting its presence in rice. Luo Yueping, the director of the Hunan Environmental Monitoring Center, is tasked with researching the distribution of cadmium in the province\u2019s rice paddies. The government hopes that his work will help to quantify the extent of the contamination and form the basis of an action plan.<\/p>\n\n\n\n The government\u2019s plan to set up a system of safe farming practices and monitoring was due to be completed this year. But concerns about food safety are in conflict with the central government\u2019s anxieties over national food security<\/a>, which leads it to press agricultural provinces such as Henan and Hunan to produce more food, pressure that makes the provincial authorities reluctant to discourage farmers from planting, even in contaminated land.<\/p>\n\n\n\n![](\"https:\/\/dialogue.earth\/content\/uploads\/2014\/07\/map2_ch.jpg\")
<\/div>Industrial cost<\/h2>\n\n\n\n
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<\/div>Government response<\/h2>\n\n\n\n