“Embodied carbon accounts for 75 to 95 percent of the greenhouse gas emissions from landscape architecture projects,” said Chris Hardy, ASLA, PLA, senior associate at Sasaki, during the third in a series of webinars organized by the ASLA Biodiversity and Climate Action Committee. But by selecting locally made low-carbon materials, landscape architects can significantly reduce the climate impacts of their work.

Embodied carbon emissions are generated from the extraction, manufacturing, transportation, and construction of landscape materials. The other share of project emissions come from operating and maintaining a landscape.

“Constitution Gardens will become a biodiversity hotspot on the National Mall,” said Adam Greenspan, FASLA, design partner at PWP Landscape Architecture. “We will create a garden, based in nature, while respecting the historic design.” Constitution Gardens in Washington, D.C. opened in 1976 to commemorate the bicentennial of the American revolution. Concepts outlined in the McMillan Plan and designs by Dan Kiley and SOM shaped the landscape.

But over the past forty years, the gardens fell into disrepair and became a pass-through site on the way to other more popular destinations on the mall. Now, the second phase of a three-phase plan to revitalize the garden has been approved by the Commission of Fine Arts and National Capital Planning Commission. The design by PWP Landscape Architecture and Rogers Partners Architects will create a “new ecological landscape” designed for people and hundreds of plant and animal species.

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“The Mindfulness City will be a sustainable city. To be mindful is to be aware — to perform best,” said Giulia Frittoli, partner and head of landscape at BIG. The Kingdom of Bhutan is a landlocked Buddhist country in the eastern Himalayas, nestled between China and India. It covers 14,000 square miles and has a population of nearly 800,000.

The Royal Office of Bhutan asked BIG, Arup, and Cistri to develop a plan for a new Mindfulness City in Gelephu in southern Bhutan, near the border with India. The city will span 386 square miles and include a new international airport, railway connections, hydroelectric dam, university, spiritual center, and public spaces.

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“Landscape architects have started conversations about embodied carbon. There is a realization that we can no longer ignore the grey parts,” said Stephanie Carlisle, Senior Researcher, Carbon Leadership Forum and the University of Washington, during the first in a series of webinars organized by the ASLA Biodiversity and Climate Action Committee.

The grey parts are concrete, steel, and other manufactured products in projects. And the conversations happening are laying the foundation for a shift away from using these materials. The landscape architect climate leaders driving these conversations are offering practical ways to decarbonize projects and specify low-carbon materials.

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"We are focused on creating a just public realm," said Chelina Odbert, Hon. ASLA, CEO and founding principal of Kounkuey Design Initiative (KDI), at the National Building Museum in Washington, D.C. And by just, "we mean free, inclusive, accessible, unbiased, and equitable". A "just public realm is open to everyone.” There is unlimited access to streets and public spaces so people can travel to school and work and be full members of their communities.

Unfortunately, the public realm is instead often “intimidating, exclusionary, inaccessible, unjust, and inequitable” for many women, LGBTQIA+ people, people with disabilities, and people of color. Landscape architects, planners, and others need to understand who feels safe and comfortable in public spaces or there is a risk of perpetuating inequalities, Odbert argued.

Each year, the Trust for Public Land (TPL) issues its ParkScore, which ranks the park systems of the 100 most populated cities in the U.S. This year, the organization also explored the positive health outcomes of top-scoring cities, looking at more than 800 innovative programs and practices that integrate park and healthcare systems.

“Our fellows have shown courage, written books, founded mission-driven non-profits, created new coalitions, and disseminated new tools,” said Cindy Sanders, FASLA, CEO of OLIN, in her introduction of the Landscape Architecture Foundation (LAF) Fellowship for Innovation and Leadership program at Arena Stage in Washington, D.C.

Sanders highlighted the results of a five-year assessment of the LAF fellowship program and its efforts to grow the next generation of diverse landscape architecture leaders. The assessment shows that past fellows are shaping the future of the built environment in key public, non-profit, and private sector roles.

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In midtown Manhattan, the street crossings surrounding the entrance to the Lincoln Tunnel were once some of the most challenging in the city. A mess of highway ramps, missing sidewalks, and concrete barriers made the corner of Dyer Avenue and 30th Street an area to avoid.

Now with a new $50 million elevated connector, pedestrians can safely move 30 feet above the intersections using a 600-foot-long L-shaped bridge from the High Line to Moynihan Train Hall.

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The institution of slavery shaped landscapes on both sides of the Atlantic Ocean. And in turn enslaved and free Africans and their descendants created new landscapes in the United States, the Caribbean, and Sub-Saharan Africa. African people had their own intimate relationships with the land, which enabled them to carve out their own agency and culture.

At Dumbarton Oaks in Washington, D.C., a symposium — Environmental Histories of the Black Atlantic World: Landscape Histories of the African Diaspora — organized by N. D. B. Connolly, a professor at Johns Hopkins University, and Oscar de la Torre, a professor at the University of North Carolina at Charlotte, sought to highlight those forgotten relationships between people and their environment.

This Earth Day, U.S. Vice President Kamala Harris highlighted the many benefits of nature-based solutions and recognized the important role of landscape architects in this work. At the University of Miami, she also announced $562 million in funding for coastal resilience projects, supporting 149 projects in 30 states, through the Climate-Ready Coasts Initiative of the National Oceanic and Atmospheric Administration (NOAA). Vice President Harris’ remarks build on the Biden-Harris administration’s support for planning and designing with ecological systems in an equitable way.

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“Economic shocks, climate change, and COVID-19 have changed transportation systems in a fundamental way. We can’t waste a crisis. We can increase access to transportation while reducing greenhouse gas emissions. We can achieve more mobility with fewer impacts,” argued Ani Dasgupta, president of the World Resources Institute (WRI), at the 20th annual Transforming Transportation conference. For two days, global leaders reflected on the state of transportation systems worldwide at the hybrid event in Washington, D.C., which was also watched by tens of thousands online. The event was co-organized by WRI and the World Bank.

Transportation still accounts for 25 percent of greenhouse gas emissions worldwide and up to 30 percent of emissions in developed countries. Transportation is a diverse sector that includes sidewalks, bikes, cars, buses, trains, subways, ships, and planes.

“How do we ensure new parks don’t cause ‘green gentrification,’ which can lead to the exclusion and displacement of underserved communities? How can we ensure we don’t displace the communities that new parks are meant to serve?,” asked Dede Petri, CEO of the Olmsted Network (formerly the National Association of Olmsted Parks), during an Olmsted 200 event.

New parks are meant to be accessible to everyone, but in many urban areas, developer-driven parks mostly attract wealthier Americans. Cities benefit from increased development adjacent to these new parks, bringing in higher tax revenues, but that raises questions about whether these spaces can, in effect, lead to community displacement.

New Orleans experiences the worst urban heat island effect in the country, with temperatures nearly 9 F° higher than nearby natural areas. The city also lost more than 200,000 trees from Hurricane Katrina, dropping its overall tree canopy to just 18.5 percent.

The non-profit organization Sustaining Our Urban Landscape (SOUL) partnered with landscape architects at Spackman Mossop Michaels (SMM) to create a highly accessible, equity-focused reforestation plan for the city that provides a roadmap for achieving a tree canopy of 24 percent by 2040. But more importantly, the plan also seeks to equalize the canopy, so at least 10 percent of all 72 neighborhoods are covered in trees. Currently, more than half of neighborhoods are under the 10 percent goal.

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“Seneca Village was an important community. It was 40 acres, two-thirds African American, and had a church and school,” explained Sara Zewde, ASLA, founder of Studio Zewde and assistant professor at the Harvard Graduate School of Design, during a session at the ASLA 2022 Conference on Landscape Architecture in San Francisco.

The 225 residents of Seneca Village were displaced by the New York City government in the mid 1800s to make way for Central Park, which is considered one of the masterpieces of landscape architect Frederick Law Olmsted and architect Calvert Vaux.

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“Superstorm Sandy in 2012 was a wake-up call for NYC and made the city realize it needed to better prepare for climate change,” said Adrian Smith, FASLA, vice president at ASLA and team leader of Staten Island capital projects with NYC Parks. Due to storm surges from Sandy, “several people in Staten Island perished, and millions in property damage were sustained.”

On the 10th anniversary of Sandy, Smith, along with Pippa Brashear, ASLA, principal at SCAPE, and Donna Walcavage, FASLA, principal at Stantec, explained how designing with nature can lead to more resilient shoreline communities. During Climate Week NYC, they walked an online crowd of hundreds through two interconnected projects on the southwestern end of the island: Living Breakwaters and its companion on land — the Tottenville Shoreline Protection Project.

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A persuasive local advocacy and media campaign convinced the U.S. Army Corps of Engineers to conduct a new, expanded study for a $6 billion project to protect Miami from future hurricanes, coastal flooding, and climate impacts. Critics argued that the Army Corps’ initial draft plan for the project, which had proposed a series of sea walls and gates, would have negatively impacted the character of Miami, reduced property values, and cut-off access to important waterfront parks, exacerbating existing inequities in access to public space.

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