We have foods now

现在我们不缺食物
where people are concerned about the nutrient value of the foods and the like.

但人们却担心食物的营养价值等问题
A lot of things have changed,

很多东西都变了
but there can be downsides to modern agriculture

这些成为现代农业的弊端
and we're going to talk about some of those now.

我们今天就来讨论其中的一些问题
The key question really is that we have unimaginable success

症结在于我们已在食物数量和多样性方面
in providing an abundance, a wide of array of foods,

取得了难以想象的成功
but there is a potential downside.

但这也存在潜在的不利因素
We want to ask this class and next,

我们就想知道
what is the impact of the modern food environment on these things?

现代食品环境对于这些有什么影响呢
We'll talk about each of these.

我们将逐一讨论到
Biodiversity is especially interesting issue;

生物多样性是个特别有趣的问题