Big vertical farms promised to grow salad in city warehouses, and several of them ran out of money. Click & Grow took the idea down to the size of a toaster: a white tub, a lamp on a stalk and nine little seed pods that sprout basil, lettuce or tomatoes on a flat's windowless counter.
Indian kitchens throw away a lot of peels, tea leaves and leftovers, and most of it still ends up mixed with plastic at a landfill on the edge of town. Daily Dump's answer is a stack of clay pots on the balcony.
Flushing a toilet or watering a garden with drinking water makes little sense in a warming Europe, but storing rain usually means a huge buried cylinder and a deep hole. GRAF's Platin tank is flat instead.
Modern walls are too well made for bees. Old brickwork had cracks and crumbling mortar where mason bees could lay their eggs; new facades have none. The Bee Brick puts a row of holes back into the wall, on purpose.
A busy shopping street can fill an ordinary litter bin in hours, which means a van, a crew and fuel to empty it several times a day. Mr. Fill's answer is a bin with a solar panel on the lid and a press inside.
