My friend Willow over at Willow House Chronicles always finds the BEST videos! (Which I subsequently shamelessly steal from her blog to post on mine.)
Here's a great on on why more of us should be growing our own food.
You don't need to farm to grow your own food. Even the smallest yard can produce produce. And if you don't have any yard (or balcony) at all, look into a community garden plot - most cities have them these days!
Get out there and GROW!