A rooftop garden has long been a dream for many city dwellers. An engineer living on the western outskirts of Hanoi has found a way to run a sustainable, self-circulating garden.<br /><br />WATCH MORE: https://thestartv.com/c/news<br />SUBSCRIBE: https://cutt.ly/TheStar<br />LIKE: https://fb.com/TheStarOnline
