声音简介
Officials estimate there are 169 hippos in Colombia and that many of them are in the Magdalena River area.
They estimate that if no measures are taken, there could be 1,000 by 2035.
Environment Minister Susana Muhamad said the first step of the plan will be to sterilize 40 hippos each year and this will begin soon.
The method is costly.
Each sterilization costs about $9,800.
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