He said the Earth is like a large mechanical device that will survive only if people living on it know how to operate it correctly.

VOA: special.2010.05.30

So the benefits turned out to be only $49.5 million and so they didn't install the device.

收益最后只有4950万,因此他们没有安装该装置。

耶鲁公开课 - 公正课程节选