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JUST ADD WATERGrowing your own veggies may become possible even for urbanites with tiny studio apartments.Israeli startup Living Box offers a modular, unfoldable, solar-powered little greenhouse that you can use to harvest anything from tomatoes to tea and herbs.“We have a slow release water system for irrigation, with a novel liquid nutrient solution and bacteria to avoid the use of pesticides, as well as an app prototype updating weather conditions and other relevant data right to your smartphone, so you don’t have to monitor it,” explained Nitzan Solan, CEO of the company.The idea was to create a sustainable, affordable and simple mobile farming system that could be operated by anyone around the globe.As of now, Living Box is testing in 50 sites around Israel, the U.S. and Nigeria, and aims to try locations in Spain and Fiji. It is expected to carry a market price of $300.

The design is “based on what we know is affordable housing in Puerto Rico for a single family,” says Hector Ralat, an architect based in the firm’s Puerto Rican office. “But the focus was to alter the DNA of that knowledge and to put in the essential components that someone would need to sustain living conditions for at least two weeks, which is the recommended time here for someone to receive aid after a disaster.” The houses will likely cost around $120,000, a number that lets homeowners access favorable interest rates on mortgages. The units can be stacked on top of each other; in Villalba, most of the community will be three stories high (the solar will serve the whole building).

“We just know our product is better than stick-built construction in these types of dangerous environments,” says Paul Galvin, chairman and CEO of SG Blocks, the parent company of SG Residential. “Heavy-gauge steel structures are just designed to a high tolerance for the effects of climate change.” The houses, most of which will have two bedrooms, will start at $90,000 to $130,000. It might be possible to build cheaper houses, Galvin says, but the company is “trying to deliver product that is quality-driven, in that it’s going to be built once and it’s not going to be destroyed every storm.” The company is also working with a bank to create a mortgage that is similar in monthly cost to a car payment. The design can incorporate solar panels.

HiveCube, another modular housing company, is also using shipping containers, and has targeted a much lower cost–the houses start at $39,000 for a two-bedroom home. “We believe that your safety should not be a matter of income, but a given when you are planning to buy a home for your family,” says María Velasco, cofounder of HiveCube. The homes are designed to be fully off the grid, with solar power and batteries, a rainwater collection system, and a gray and black water treatment system that uses plants and bacteria to treat wastewater instead of septic tanks.