If you take a look just at water, what we see is that, with four very common products, you look at how much a farmer produced to make those products, and then you look at how much water input was put into them, and then you look at what the farmer was paid.
Ha csak pl. a vizet vizsgáljuk, ezt látjuk négy igazán hétköznapi terméknél: ennyit termelt a gazda, ennyi vizet használt hozzá, ennyi pénzt kapott érte.