It is debatable whether you are saving 'food' miles on this product as you'll need mung beans which'll have come from some far off distance place - but at least you're not importing a finished product which is filled with water rather than a compact seed - it's also a fraction of the price.
1) a container of some sorts - I use a 'butter' spread container
2) a pointy thing
3) mung beans
4) plenty of water
If you want the same thing go check out this instructable (he did it first!): http://www.instructables.com/id/STGACNIF7DWQXQF/