We help these families have permanent land for cultivation, we help them access modern technology with low-water-intake drip irrigation, we create village reservoirs for year-round water, and then we teach them to produce fruits and vegetables with a harvest every two weeks so they can sell year round.

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Among these figure water-harvesting technologies and drip irrigation, as well as technologies that recycle grey water in peri-urban agriculture.

UNESCO: World Water Assessment Programme (WWAP)

He cleared land, built dams, planted out new strains of coffee bush and laid pipelines to drip feed the plants with water and fertiliser.

ECONOMIST: Feed the world

Experts recommend that you use bubblers or drip irrigation systems that deliver the water very close to the young plants.

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Israel is experimenting with drip hoses as one way to vastly reduce the water wasted in irrigation.

CNN: Fuelling our future

Small price rises for water have led to more rational planting, and to techniques like drip irrigation.

ECONOMIST: California's economy

But modern drip irrigation uses underground computerized probes and long plastic tubes to slowly release water over long distances.

BBC: The Negev desert wine route

The water saturates the grounds without leaving any of those little divots in the coffee the way most drip coffee makers do, a sure sign of gentler, more even flow.

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It invests in businesses dedicated to making social change, like the drip irrigation company MicroDrip, which intends to save farmers money by enabling them to use less water to irrigate their crops.

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