A lush rooftop oasis has sprouted atop an elementary school roof in Hangzhou, China to bring kids closer to nature and healthy fresh food. Built by Pujia Primary School and a team from Zhejiang Province Agricultural Academy, the lush rooftop farm covers an area of more than 2,000 square meters and grows a variety of fresh vegetables, from pumpkins to pomegranates, all of which are free of chemical pesticides.