Leadership in the coal industry today means navigating the delicate balance between economic necessity and environmental responsibility.

每一个科学进步都迫使我们面对新的伦理问题。

"The greatest tragedies are not the ones we see coming, but the ones we never expected."

如果你掌握了所有事实，你的判断可能是正确的；如果你没有掌握所有事实，你的判断就不可能是正确的。