Where does our food come from?

No civilization has ever been in this state of environmental ignorance. In previous eras, people who lived in an area, whether they were newcomers or old-timers, had to be intimately aware of their surroundings and viscerally involved in rearing and preparing food for the table.
But in recent decades, in our culture, putting food on the table does not require any knowledge or involvement except how to scan a credit card, open a plastic bag, and nuke it in the microwave. No civilization in history has ever been able to be this disconnected from its ecological umbilical. And in more frequent dinnertime discussions, I'm finding more and more people wondering if a civilization this disconnected can actually survive.
Today we can live day to day to day, even a lifetime, without thinking about air, soil, water, lumber, and energy. If we do think about them, we think about them in the abstract. We don't have a visceral relationship with any of these essential resources.
{Joel Salatin, Folks, this ain't normal}