The act of writing is an act of self-discovery.

Coal isn't the problem - how we use it is. The solution lies in cleaner technologies and better utilization.

Education is one of the most powerful tools for reducing inequality.

行为法则可以从基本的生理原则中推导出来。

可持续性不仅仅是一个流行词，而是我们对后代的责任。

欧洲不应是一个怀旧的洲，而应是一个充满希望的洲。