Mining with integrity means leaving the land better than we found it.
诚信采矿意味着让土地比我们发现时更好。
实现明天的唯一限制将是我们今天的疑虑。
衡量森林价值的真正标准不是木材的板英尺数,而是几个世纪的生态平衡。
Do not put forward anything that you cannot prove by experimentation.