Te Radar finds that when it comes to land, the more you put in, the more you get out, thanks to a school in Hamilton turning their grounds into the classroom of the future.
Te Radar uncovers the hidden potential in two weeds: one provides food and cleans water, the other makes houses, roads, bridges, bullet-proof suits and even pizza.
Hunting out green design leads Te Radar to the USA where old tyres, cans and bottles form homes of the future, and to Kapiti where a chap uses rocks to air-condition his home.