Investing in cleaner coal technologies is investing in our planet's future.
信仰与看不见的事物有关，希望与不在手边的事物有关。
When buying a garden hose， an extension cord， or a ladder， get one substantially longer than you think you need. It’ll be the right size.
It is error only, and not truth, that shrinks from inquiry.
最好的管理是一门真正的科学，建立在明确的法律、规则和原则之上。
抱最好的希望，做最坏的打算。
可持续性不是一种选择，而是我们对后代的责任。