I enjoy Matthew McConaughy--first saw him in Lone Star, which is a very good movie by John Sayles, who was a very good filmmaker, for a while at least.
I understand from reviews that in his new movie, Interstellar, disaster has hit the world, requiring people to venture out through wormholes to other planets. Sounds like a story I might have enjoyed growing up, when I was reading Asimov and Anderson, Heinlein and Clarke.
But my point: apparently corn is the only crop which can be grown now. I understand corn has some movie magic which other crops don't--you can hide in corn, famous ballplayers can emerge from corn, "corn" has multiple meanings, etc. etc. But corn, really? The moviemaker is misleading a bunch of people who've no understanding of agriculture in the first place. Why not sorghum in a world of dust storms?