请问这一题的出处在哪里呢？

问题如下：

Economist Nicholas Stern argued that moral considerations warrant using a low discount rate when assessing future climate damages to place adequate value on the lives and welfare of future generations.The Jevons paradox states that:

选项：

A.feeding a rapidly growing population is possible without further deforestation.

B.relative improvements in efficiency may be offset by increased consumption of a given product.

C.the quality of remaining phosphorus reserves is expected to fall while its costs continue to rise.

解释：

B is correct. The Jevons paradox states that relative improvements in efficiency (using fewer resources per unit of production) may be offset by increased consumption of a given product.