秘鲁利马的捕雾网技术，让沙漠开出社区花园
On the dry hills above Lima, a strange sight catches the eye: rows of fine nylon nets stretched between poles, standing like giant volleyball nets in the fog. These are fog catchers—simple, low-tech devices that trap moisture from the thick coastal mist known as *garúa*. For weeks at a time during winter, Lima’s sky is a grey blanket, but those nets collect enough water to drip into pipes and fill tanks. It sounds like magic, but it is pure physics: tiny droplets cling to the mesh, merge, and trickle down into a gutter that feeds a garden below.
The real magic happens when that water meets the soil. In a neighbourhood called Villa María del Triunfo, a group of young residents – some engineers, others artists or simply neighbours tired of dust – have turned a barren slope into a lush terraced garden. They grow spinach, lettuce, herbs and even small trees, using only water harvested from the fog. Every morning, they check the nets, clean the pipes, and carry buckets to the plants. What was once a patch of dry earth is now a green pocket that families visit after work, where children learn where food really comes from.
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