The New York Times has published a few op-eds on the future of agriculture and food in this country. (Read them here and here.)
I keep thinking that in the next 50 years, the United States must become more agrarian simply to survive. Sometimes I play out a scenario of an environmental and economic apocalypse that destroys life as we know. Not life itself. People will keep living, but we won't be living this way. It's more than gardening, recycling, changing our lightbulbs. It's systemic. And we've got to do more.
If you're interested, take a good look at the Food Democracy Now website and read some of Michael Pollan's books. I think we can actually make some changes through grassroots politics. But we've got to do something.