Probably more anxious will be seven American students from Cascade High School, Idaho, who built the bio-reactor after Mr Godson heard how they used similar technology to filter water in a nearby lake.

• 也许会更着急七名美国学生在高中串、爱达荷州、谁建的生物反应黄干儿子听到后如何用类似技术过滤水湖附近.