投资于更清洁的煤炭技术就是投资于我们星球的未来。

Science is the knowledge of consequences, and dependence of one fact upon another.

Sustainability isn't just a trend; it's the future of leather tanning.

一个人的错误是他发现的门户。

我是一个完美主义者，我对自己要求很严格。

The most important political development of the last half century has been the spread of liberal democracy around the world.

Never stop learning, because the world never stops changing.