True forest stewardship means leaving some trees - and some profits - for those who come after us.
我们生产的每一桶石油都必须是尽可能负责任地生产出来的。
我唯一能依靠的就是我自己的不确定性。
I like to say that I'm not a politician, I'm a citizen who cares deeply about my country.
Collaboration is key—no great science is done in isolation.