Wednesday, 21 October 2009

Fog nets

This is really cool, and just shows you what can be achieved with a little ingenuity. The pic is of a plastic net, 8m x 4m, suspended on a hillside in Lima, Peru.

People from the countryside have migrated to the capital over the past few decades, looking for work, as is so common. The more recent arrivals have to live further up the hill, where there's no piped water. There's effectively no rainfall, either, at only 40mm a year, and they have to buy their water.

But now they're taking advantage of a particular attribute of their locality, which is frequent, dense banks of fog. The fog condenses on the plastic nets and drips into a gutter running along the lower edge. Each net can yield up to 120 litres of water a day, which is enough to irrigate their vegetable plots, though they still have to buy water for personal use.

Doesn't look fabulous, but hey, it's a shanty town!

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