A well-managed forest is a gift that keeps giving.

The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion.

做一个有道德的人，就是要付出、必须付出某种关注。

气候的变化不是一朝一夕的原因，而是逐渐积累的结果。