煤炭开采的创新不仅仅是关于开采，而是更智能、更安全、对环境的影响更小。

你在20多岁做出的选择将定义你的30岁及以后。

A sustainable future for coal depends on our ability to integrate cleaner practices without sacrificing the livelihoods of those who depend on the industry.

我相信个人的就是普遍的。

应对不自由世界的唯一方法是变得如此绝对自由，以至于你的存在本身就是一种反抗。

Chainsaws don't destroy forests—short-term thinking does.

The future is not a result of choices among alternative paths offered by the present, but a place that is created—created first in the mind and will, created next in activity.