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Posts Tagged ‘carbon sequestration’

BY MEG CALKINS, FASLA

New technologies can reduce the environmental footprint of the most-used construction material.

FROM THE JULY 2017 ISSUE OF LANDSCAPE ARCHITECTURE MAGAZINE.

Concrete in the 21st century promises to be a more sustainable material, and given the nine billion metric tons used globally each year, it must be. Portland cement, the binding agent in ordinary concrete, has a very high carbon footprint, resulting in just under one ton of carbon dioxide (CO2) released for every ton of cement produced. With 4.2 billion metric tons of the binder used each year worldwide, cement production is responsible for nearly 8 percent of total global carbon emissions. The high lime content of ordinary portland cement contributes about two-thirds of cement’s CO2 impact through the process of limestone calcination. The other one-third of CO2 released is from combustion of fossil fuels.

Technologies to improve the carbon footprint of concrete are currently in the early stages of development, but some, including carbon sequestration in concrete and substantial reductions of cement using energetically modified cement, are now commercially available. Concrete surface products for paving and walls to scrub air pollution, as well as new self-healing concrete products, are also worth investigating. We have heard about some of these innovations for a decade or more in the research community, but many are finally being brought to market—some more quickly than others. Europe is ahead of the United States in the adoption of these technologies, largely because of more rigorous clean air and carbon reduction initiatives.

New technologies in any field can take a long time to move from the laboratory to the marketplace, but (more…)

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BY JAMES TRULOVE

Back from a dozen years in London, the designer is focusing on climate and the world she has made her home.

THE FOLLOWING IS AN EXCERPT FROM “MARTHA SCHWARTZ, RECONNECTING” IN THE JULY 2017 ISSUE OF LANDSCAPE ARCHITECTURE MAGAZINE. FOR THE FULL ARTICLE, PLEASE SEE THE MAGAZINE.

Martha Schwartz, FASLA, and her business partner and husband, Markus Jatsch, last year relocated from London to Brooklyn, though the London office remains the headquarters of their firm, Martha Schwartz Partners. Schwartz continues to teach at the Harvard Graduate School of Design—though her projects have taken her firm just about everywhere but the United States. James Trulove, a former editor of LAM, who has known Schwartz for years, joined her and Jatsch, who is trained as an architect, for a conversation to find out what prompted the move and where Schwartz is directing her design and teaching now.

James Trulove: You now have offices in New York, London, and Shanghai. I guess there are many opportunities for a landscape architect in China given the enormous amount of construction that is taking place. What is it like to work there?

Schwartz: Unfortunately the quality of much of the built work is poor, (more…)

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