写作是留下痕迹，是在世界上留下印记。

The human mind is so complex and things are so tangled up with each other that, to explain a blade of grass, one would have to make a diagram of the universe.

The truth is: the natural world is changing. And we are totally dependent on that world. It provides our food, water and air. It is the most precious thing we have and we need to defend it.

技术将推动能源的下一个时代，但人类的聪明才智始终是其核心。