短缺乃是一种符号，它意味着价格被人为地保持在低于供求双方可以自由行事时的水平。

The things we admire in men, kindness and generosity, openness, honesty, understanding and feeling, are the concomitants of failure in our system. And those traits we detest, sharpness, greed, acquisitiveness, meanness, egotism and self-interest, are the traits of success.

可持续性不是一个流行词，而是矿业前进的唯一道路。