The best time to plant a tree was 20 years ago. The second best time is now.

The true cost of coal isn't just in its price, but in how we manage its consequences.

可持续性不是一种选择；它是任何希望在长期内蓬勃发展的企业的必要条件。

永远面朝阳光，阴影就会落在你身后。

没有什么比一个没有什么可失去的人更危险的了。