Study by ResearchersA study by researchers at CU Boulder and Edinburgh Napier University finds that high-density, low-rise environments such as those found in Paris are the optimal urban form when looking to reduce greenhouse gas emissions over their whole life cycle. There is a growing belief that building taller and denser is better. However, urban environmental design often neglects life cycle GHG emissions. Here we offer a method that decouples density and tallness in urban environments and allows each to be analysed individually.
Study by ResearchersLife cycle greenhouse gas emissions (LCGE) versus a number of people accommodated for a fixed land area. The work, recently published as an open-access paper in npj Urban Sustainability, contributes to a growing debate around the design of future urban environments.
Study by ResearchersJay Arehart, an author on the paper and instructor in the Department of Civil, Environmental, and Architectural Engineering at CU Boulder, said the work challenges current conventional understanding that tomorrow’s cities must be densely packed and stretch upwards to address and curb greenhouse gas emissions.
Study by Researchersa HDHR, b LDHR, c HDLR, d LDLR. The height of each building is mapped to the color with blue as low heights and red as high heights. Pomponi et al. The researchers simulated 5,000 environments based on real-world data to establish their lifecycle greenhouse gas emissions.
Study by ResearchersWe developed a novel urban density metric to measure things up as accurately as possible. Our results show that density is indeed needed for a growing urban population, but height isn’t. So it seems the world needs more Parises and fewer Manhattans—as much as I love New York—in the next decades—Francesco Pomponi Resources Pomponi, F., Saint, R., Arehart, J.H. et al. (2021) “Decoupling density from tallness in analysing the life cycle greenhouse gas emissions of cities.” npj Urban Sustain 1, 33 doi: 10.1038/s42949-021-00034-w
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