Grandma's roof garden

"Granny may be old, but she's certainly not feeble - or idle. She's built a splendid vegetable garden from scratch on the rooftop terrace of her apartment building in Southwest China. She collects thrown-away produce and either feeds it to her chicks and geese or composts it for the garden. She teaches the neighborhood children to care for the garden like she does - with love, devotion, patience, and pride. And come harvest time, Granny gathers h...