Traditional slash and burn farming methods have exhausted the soil.

刀耕火种的传统耕作方式已经使土壤枯竭了。

Modern farming methods can have an adverse effect on the environment.

现代农业耕作方法可能对环境造成负面影响。

Changes in farming methods have badly affected employment in the area.

耕作方法的改变严重影响了这个地区的就业。

The farming methods of ants are at least sustainable.

蚂蚁的养殖方式至少是可持续的。

I know some of the other presentations are looking at food and farming methods and what they do to the environment, so I think we'll avoid that.

我知道其他的一些演讲是关于食物和耕作方法以及它们对环境的影响的，所以我想我们会避免这些话题。