We decided to film in two locations [Canada and Argentina]. When we started doing all of the scouting, we were very extensive. We drove more than 10,000 miles, and found that we couldn’t do it in America because the nature was just decimated. Rivers were dammed, all of them, and the forests have been cut and replaced with farmland everywhere. It was a sad situation. We went to Canada, then, and there is a little more left, and it was still accessible. We didn’t want to shoot at the end of the world.