He worried about its future. Roosevelt wrote: "I recognize the right and duty of this generation to develop and use the natural riches of our land.

VOA: special.2010.08.12

So if you're taking... so you have to make sure that whenever you take land that there is enough left for other people to use... - Right.

所以。。。你得保证,占有土地时，要有足够剩余,留给其他人，-对。

耶鲁公开课 - 公正课程节选

..That's just as good as the land that you took, so... That's true. Locke says there has to be this right to private property in the earth is subject to the provision that there be as much and as good left for others. What's your name?

而且是跟你占有的土地一样好的。,的确如此，洛克说过,土地私人所有必须遵守的是,还有足够多足够好的土地留给别人，你叫什么？

耶鲁公开课 - 公正课程节选

Individuals have a right to own the country's land.

VOA: standard.2009.11.01

"When you put that all together it suggest that we are going to need something like 50 percent more, perhaps 100 percent more, food from our existing land and that is a very significant challenge and we believe we need to be thinking seriously about that right away,"

VOA: standard.2009.10.21