The construction sector—the most polluting and difficult to decarbonize—must build less, use more sustainable materials and clean up conventional ones to slash its emissions, the United Nations said on Tuesday.
A report published by the UN Environment Programme and Yale Center for Ecosystems and Architecture on Tuesday called on the sector to prioritize a"circular" approach that avoids waste.
Building less and repurposing existing structures generates 50-75 percent fewer emissions than new constructions, the report said. Conventional materials that cannot be replaced—concrete, steel, aluminum, glass and bricks—must find ways to decarbonize further, said the report.would accelerate efforts to clean up these especially carbon-intensive materials.The share of concrete in world construction should be cut by half between 2020 and 2060 for an effective decarbonization of the sector, the report recommended.
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