煤炭的真實成本必須既考慮其即時價值,也考慮其對社區(qū)和生態(tài)系統(tǒng)的長期影響。
數(shù)學的本質(zhì)在于它的自由。
每個人都有存在的意義,我真心相信這一點。
MODERATION. Avoid extreams; forbear resenting injuries so much as you think they deserve.
The right incentives can turn conflicts into cooperation.