The threat to the traditionally lush province, which supplies neighbouring Hong Kong with most of its water, meant that in three years only a third of its water demand would be met, China Daily said.
"By 2020, the shortfall will widen to about half of the province's water demand, or more than 3.1 billion cubic metres, if no measures are taken to address the problem," Zhang Hong'ou, president of the Guangzhou Institute of Geography, was quoted as saying.
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