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| ]China's marine economy has experienced a boom over the past decade, |
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| recording an average annual growth rate of over 16 percent. |
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| Figures from the State Oceanic Administration show that China's Gross Ocean Product amounted to three trillion Yuan, or about 400 billion US dollars, last year. |
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| But marine pollution has also been on the rise. |
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| Yu Zhiming, an oceanology researcher at the Chinese Academy of Sciences, explains one of the reasons. |
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| "The over-development of offshore fish farming has polluted some areas of the sea with excessive amounts of nitrogen and phosphorus. |
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| As a result, marine waters are increasingly suffering from eutrophication and red tides in recent years." |
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| According to the State Oceanic Administration, China's marine fishing industry made up 20 percent of the marine economy last year. |
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| The only sectors that charted higher were marine transportation and coastal tourism. |
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| Meanwhile, the area of marine water classed as polluted jumped to nearly 150,000 square kilometres in 2009, an increase of 7 percent year-on-year. |
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| Last year alone, China's coastal area reported nearly 70 occurrences of red tides, affecting a total of 14,000 square kilometres of marine water. |
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| In light of this situation, Yu Zhiming says the country should come up with effective ways to protect its marine environment. |
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| "We should encourage ecological ocean farming. |
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| For example, we can carefully select the types of fish we breed in a fish farm so that the waste of one kind of fish functions as food for another. |
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| Moreover, we should encourage the cultivation of macro-algae to purify the waters plagued by eutrophication." |
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| Zhao Weihong, another researcher from the Chinese Academy of Sciences, says comprehensive measures are needed to address marine pollution. |
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| "Many of the pollutants in China's marine waters come from the land. |
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| So the authorities should take coordinated steps to treat pollution in the sea and on the land as well." |
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| The State Oceanic Administration said that the most heavily polluted marine waters such as those of Bohai Bay, |
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| the Yangtze River estuary and the Pearl River estuary are situated beside booming terrestrial areas. |
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| Also, over 70 percent of the country's monitored sewage outlets discharge an excess of pollutants into the sea. |
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| For CRI, I'm Wu Jia. |
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