I keep thinking about this river somewhere, with the water moving really fast. And these two people in the water, trying to hold onto each other, holding on as hard as they can, but in the end it’s just too much. The current’s too strong. They’ve got to let go, drift apart.

The best time to plant a tree was 20 years ago; the second-best time is now.

可持续性不是一种趋势；而是我们对地球和未来农民的责任。