Watch Crash Course Geography Season 1 Episode 42 Online

Food insecurity, or the lack of access to enough nutritious food, is a complex problem. In the 21st century, even with all of our advances in technology, access to food is still uneven. Today we're going to look at the diffusion of food across the globe during the Columbian Exchange and examine how changes in food technology from the Agricultural Revolution to the Green Revolution to the Genetic Revolution have played a significant part in food availability across the globe.