A ship in port is safe, but that is not what ships are built for.
可持续性不是一种选择,而是必须——如果我们想在养活不断增长的人口的同时不破坏地球的话。
有些事情太严肃了,你不得不对它们一笑置之。
We must mine coal responsibly today so that our children inherit both energy security and a healthy environment.
Leadership is about making others better as a result of your presence and making sure that impact lasts in your absence.