You do not need power tools and PVC to make these sub-irrigated planters (SIPs)
Do your friends a favor and pass the word.
Systems like the Valcent VertiCrop are the servers and mainframes of urban food production. Just as in the digital world, we also need distributed food production power brought to the people on a personal level.
Sub-irrigated (sub-aerated) planters (SIPs) like this one are the PCs and laptops of personal urban food production. You might also think of them as the iPads and iPhones of food.
There is no need to plug them into tillable earth. They are portable. All that is needed is a small space with sufficient sunlight, be it on a rooftop, balcony, driveway, paved patio or even a fire escape. They will produce more food per square foot than in-ground gardening while conserving water and valuable time. This is safe food production with no exposure to contaminated city soil.