and the biological, economic, and political reasons

生物学经济学方面和政治方面的因素
that drive food to be certain things,

是如何影响食品的
and we'll talk about what it does to us and for us.

我们还会谈到它对我们的影响和帮助
And, probably most important of all is can the food environment change?

或许最重要的一点食品环境能够改变吗
There are probably those of you in the class already

在坐的各位当中可能已经有人
who are outraged by things like the modern food environment,

对目前的食品环境感到愤怒
how much energy it takes to transport things from place to place,

很多能量浪费在食品相关的运输上
lack of concern with sustainability and issues like this,

忽略了对可持续性的关心等问题
and you'd like to see social change.

你可能希望社会会有所改变
Other people might have other interests,

其他人可能会关心另外一些问题
but we'll talk a lot about social change

但我们会谈很多关于社会变迁
and what might be done ultimately to effect the environment.

及对于改变环境我们最多能做到什么