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

Forests are the lungs of the earth, and we must protect them with the same urgency as our own health.

The past is always there, and it's always different every time you look at it.

Science is not a game for one person.

The real and effectual discipline which is exercised over a workman is that of his customers.

理论物理学是一种形而上学。