The value of a commodity, or the quantity of any other commodity for which it will exchange, depends on the relative quantity of labor which is necessary for its production, and not on the greater or less compensation which is paid for that labor.

最成功的林业公司将是那些将可持续性作为每个决策核心的公司。

小行动，当乘以数百万用户时，可以改变世界。