The future of coal depends on balancing economic growth with environmental care.

The decisions of the poor are often heartbreakingly rational.

A man, as a general rule, owes very little to what he is born with – a man is what he makes of himself.

"La imaginación es la única arma en la guerra contra la realidad."

数学家最好的工作往往来自于在别人看不到联系的地方发现联系。

我在未完成的事物中发现美。