Geoff Johnson is dwarfed by the green-water tank in his front yard, hiding discreetly behind a trellis-style fence.
In his backyard, a smaller half-cylinder tank sits flush against the wall.
“This overflows into another series of rain barrels under the deck,” he said, surveying his extensive garden, kept well-watered without turning on the tap.
Johnson, a permaculture educator, also uses the rain water to fill his washing machine and estimates he diverts 18,000 litres of water from city’s storm drains annually.
Soon,