Clip-on retrofit of cities

Vanessa Keith has a provocative article about urban reforestation. Rather than focus on new buildings, a small percentage of any city, Keith proposes rebuilding through a “clip-on” to existing urban structures and infrastructures. Keith considers roofs, walls, and highways as valuable surfaces that increase by factors of two (for in-fill structures) or six (for free standing structures) the total surface area of a city.

Her clip-on ideas include green roofs, roof ponds, vertical gardening, waterfalls for cooling and power generation, wind bands, and more urban trees. I like how she connects urban solutions with rural deforestation, and considers government incentives and the potential role of large developers and community groups in creating a demonstration block in New York City.

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