"At a time when the global population is growing, our global climate is changing.

VOA: special.2009.11.23

What this has to do with global economy is that you have to be able to feed the population.

这与世界贸易之间的关系,就在于你必须先让民众衣食无忧

耶鲁公开课 - 欧洲文明课程节选