The environmental case against agro-subsidies

Essentially the nub of the argument is this: "Where there are subsidies, you find people essentially manufacturing environments in which to grow food, because they're getting paid $2 for every grain of rice they produce (or whatnot). The huge profit margins make it economical to import water from far, far away, or build elaborate systems to 'trick' crops into growing, and so on."
The (environmental) case against agro-subsidies | Gristmill: The environmental news blog | Grist Magazine: