Urbanists are beginning to recognize the value of green space in the city. With the rise of “treescrapers” – man-made vertical forests – in speculative architecture, it appears that architects are embracing this trend as well. In an age where the value of urban land can prohibit the creation of new parks, with a focus on sustainability, treescrapers have been proposed as a solution. But as City Lab points out, this typology also raises key questions regarding sustainable building and public realm. Compelling as a concept, the treescraper has yet to be put to the test in practice.