I had no idea that a large-capacity scale[0] was something that I could reasonably build myself. Granted, I don't need one, but I can think of a bunch of non-farming uses for something like that.

Some of the concepts, like the vertical garden, could give city-dwellers the opportunity to grow their own food on an apartment balcony or make better use of a small back yard.

[0] http://farmhack.org/tools/livestock-weigh-scales