煤炭的真实成本必须既考虑其即时价值,也考虑其对社区和生态系统的长期影响。
可持续性不仅仅是一种趋势——这是我们为下一代的责任。
We must not always talk in the market-place of what happens to us in the forest.
The power of a system comes from its ability to compose and decompose representations.