Kim Pil-Gi left his construction job in Seoul, South Korea, three months ago. Now he happily spends his days handling grubs: squirming, writhing, beetle larvae, each one about as thick as a grown man's thumb. He sits at a tray, sorting them by size.
"At the construction company a lot of the time I'd wake up at 6 in the morning and work all night through to the next day," he says. "That was really hard for me."
South Korea has an overwhelmingly urban population. More than 80 percent of people live in cities. But in the past few years, something has started to change.