Posts Tagged ‘carbon sequestration’

BY MEG CALKINS, FASLA

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

This week, LAM is joining more than 250 media outlets for Covering Climate Now, flooding the zone, as it were, with climate coverage in the run-up to the United Nations Climate Action Summit on September 23. Landscape and landscape architecture are deeply implicated in the future of climate progress, or a lack of it. Over the past decade, LAM has dug into climate issues of landscape in numerous dimensions, mapping the big resource picture as well as local attempts to fend off increasingly apparent hazards of global warming—from the procurement of materials to the integrity of the food supply chain. Each day this week we’ll bring you excellent stories from recent years that follow landscape architects acting and thinking about climate change and the landscape.

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 STEVE AUSTIN, ASLA

Landscape architecture can mitigate carbon emissions, but it is also implicated amoung the causes.

This week, LAM is joining more than 250 media outlets for Covering Climate Now, flooding the zone, as it were, with climate coverage in the run-up to the United Nations Climate Action Summit on September 23. Landscape and landscape architecture are deeply implicated in the future of climate progress, or a lack of it. Over the past decade, LAM has dug into climate issues of landscape in numerous dimensions, mapping the big resource picture as well as local attempts to fend off increasingly apparent hazards of global warming—from the procurement of materials to the integrity of the food supply chain. Each day this week we’ll bring you excellent stories from recent years that follow landscape architects acting and thinking about climate change and the landscape.

FROM THE JUNE 2017 ISSUE OF LANDSCAPE ARCHITECTURE MAGAZINE.

 

The Paris Agreement on climate change, created by the consensus of 197 nations, went into effect in November 2016 and has enormous implications for the practice of landscape architecture. If adhered to by its signatories, the agreement signals the end of the fossil fuel era by midcentury, well within the life spans of many landscape architects currently practicing. Though it may seem wonderfully “green,” this energy transition poses profound questions for the practice of landscape architecture at a time when the discipline is needed more than ever. (more…)

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THE GREEN NEW DEAL, LANDSCAPE, AND PUBLIC IMAGINATION

As part of an ongoing effort to make content more accessible, LAM will be making select stories available to readers in Spanish. For a full list of translated articles, please click here.

BY NICHOLAS PEVZNER

FROM THE JULY 2019 ISSUE OF LANDSCAPE ARCHITECTURE MAGAZINE.

 

Since the 2018 midterm elections, the Green New Deal has catapulted into the public conversation about tackling climate change and income inequality in America. It has inspired a diverse coalition of groups on the left, including climate activists, mainstream environmental groups, and social justice warriors. The Green New Deal is not yet fully fleshed out in Congress—the most complete iteration so far is a nonbinding resolution put forward in the House by Representative Alexandria Ocasio-Cortez (D-NY) and a companion measure introduced in the Senate by Senator Ed Markey (D-MA). At their cores, these bills are an urgent call to arms for accelerating the decarbonization of the U.S. economy through a federal jobs program that would create millions of green jobs—a 10-year national mobilization on a number of fronts aimed at reducing the nation’s greenhouse gas emissions.

The resolution text itself is a laundry list of possible goals and strategies aimed at immediately addressing climate change and radically cutting U.S. carbon emissions. These proposals are ambitious in scale and breadth: a national target of 100 percent “clean, renewable, and zero-emission” energy generation; a national “smart” grid; aggressive building upgrades for energy efficiency; decarbonization of the manufacturing, agriculture, and transportation sectors; increased investment in carbon capture technologies; and the establishment of the United States as a global exporter of green technology. What such an effort will entail on the ground is not yet clear, but if even only some of these stated goals are achieved, the Green New Deal will represent a transformation of both the American economy and landscape on a scale not seen since the days of President Franklin D. Roosevelt and his original New Deal of the 1930s and 1940s. (more…)

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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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