Chinese authorities are using contraceptive pills to cut down the number of gerbils in a north-western province plagued by the rodents.
Forestry officials are leaving pills by the gerbils' burrows to try to cut back the rodents' exploding numbers.
The gerbils, officials say, are threatening the fragile desert ecosystem in the vast Xinjiang region.
http://news.bbc.co.uk/1/hi/world/asi...ic/7963836.stm


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