When Brad Lancaster and his brother bought their home in downtown Tucson, the streetscape was a dusty place, devoid of trees or any vegetation.

In 1996 Lancaster and his neighbors started an annual tree-planting project, which up until now has resulted in over 1,400 native food-bearing trees being planted (usually with water-harvesting earthworks) in the neighborhood. In 2004, Lancaster augmented the street tree planting by using a 14-inch, gas-powered circular saw to cut away part of his curb to divert street runoff into his street-side tree basins. When the walkway in front of his home sprouted with lifelike mesquite and palo verde trees- many of his neighbors wanted to cut their curbs as well. Lancaster approached the city to convince them to make his water-harvesting technique legal. It took three years for the city to change the rules. Today, three-quarters of the neighbors on his block are harvesting rainwater.

Tucson receives just 11 inches of rainwater per year, but Brad argues this is enough. "Tucson has over a 4,000-year history of continuous farming despite this being a drylands desert community. People thrived creating crops, domesticating crops that are uniquely adapted to this climate, but in less than 100 years we almost wiped it out by becoming reliant on very extractive pumps, extracting the groundwater, diverting the river to the extent that we actually killed our river, we dropped our groundwater table over 300 feet so we didn't want to plug into that paradigm."

Today, Lancaster's downtown Tucson neighborhood (Dunbar/Spring) is alive with drought-tolerant, food-bearing trees and residents harvest from the barrel cactus (chutneys, hair conditioner from fruit), the prickly pear cactus (juice, syrup & natural sweeteners from fruit), the ironwood tree (peanut-flavored nuts, processed like edamame), jojoba (oil, coffee substitute), mesquite ("native carob", flour) and sweets from the "iconic saguaro cactus".

Lancaster's experimentation continues on his property: he calls the 1/8th of an acre site he shares with his brother's family, his "living laboratory". Here he plants around the greywater from his outdoor shower, bathtub and washing machine. He captures 100,000 gallons of rainwater per year on their property and surrounding public right-of-way. He cooks with a solar oven and heats his water using a 2 salvaged, conventional gas heaters stripped of insulation, painted black, and put in an insulated box with glass facing south to collect the sun's rays.