It’s difficult to pick highlights from any industry event, but SXSW Eco is especially diverse and packed innumerable experiences into three short days. By the numbers alone there were more than 100 educational sessions, 300 speakers, and dozens of special events, including a design competition (previously), a startup showcase, keynotes, breakfasts and more.

But as always, the meaningful stuff isn’t in the facts or figures. It’s in the experiences. I was delighted to run into friends from Sseko (who ended up winning the Startup Showcase in the Social Impact category; congrats Liz!) and had too many thought-provoking conversations to count.

Below are just a few of the highlights of SXSW Eco as we experienced it.

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Tim Schuler, gb&d’s managing editor, talks with sustainability consultant Emily Chan in the Place By Design lounge, sponsored by Autodesk. Photo: Debbie Finley.

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Entrepreneur Liz Forkin Bohannon presents at the Startup Showcase. Bohannon’s social clothing company, Sseko, took first place in the Social Impact category. Photo: Alison Gibbons.

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Key to the Street founder Jessica Lowry talks with an attendee in the Place By Design lounge. Photo: Jane Shalakhova.

1. Place By Design

This year SXSW Eco added a design track to its programming, and the Place By Design competition was the most visible evidence of it. The interactive lounge was bedecked with reclaimed-wood stools and kiosks where attendees could learn about each of the 15 finalists.

The competition brought together architects, entrepreneurs, and artists from global design firms and local activist groups alike, and the lounge allowed for a chance to mingle with all of them. Alix Ogilvie from Architecture Humanity discussed the obesity epidemic in the context of her team’s submission, Designed to Move. Key to the Street’s Jessica Lowry showed off her mobile-friendly website designed to enable community input on infrastructure upgrades and city beautification projects. And Stephen Glassman, the artist behind Urban Air, discussed the air-quality benefits of his idea to reclaim billboard space with live bamboo.

My personal favorite, and the victor in the Global Potential category, was The Looper by RTKL. The idea is ludicrously simple: take the prototypical urban greenhouse (producing fish and vegetables in closed-loop systems) and stick it on a barge. By locating such a facility on our urban waterways, the greenhouse can use the polluted water and return it to the river cleaner than before.

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An attendee reads about the Place By Design finalists. Photo: Jane Shalakhova.

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RTKL’s Agustina Soler (from left), Jocelyn Hoppe, and Ian Marcus accept their award Tuesday night. Their floating greenhouse concept won for Global Potential in the Place By Design competition. Photo: Amy Ellinger.

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A cross section of The Looper shows its inner workings and materials. Diagram: RTKL.

2. Collaborative Communities: Share, Build, & Create

If each session was as poignant as Tuesday’s panel discussion on the impact of placemaking in our cities, more people would attend these types of conferences. It was one of the liveliest and best attended events of the festival.

Moderated by Austin’s chief sustainability officer, Lucia Athens, each panelist shared stories about affecting real change in their communities, from Mike Lydon’s story of how creative vandalism can make our streets safer and earn the ear of city governments to Ashara Ekundayo’s efforts to transform an Oakland storefront into a community hub.

Sarah Baird, from the Center for a New American Dream, highlighted one of the biggest problems we face when trying change our cities for the better: the fact that we rarely know our neighbors. Through its Get2gether program, New Dream is helping connect like-minded community members to form support networks for local projects.

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The Collaborative Communities panelists (from left): Amy Baird from the Center for a New American Dream, Lucia Athens from the City of Austin, Mike Lydon from Streetplans Collaborative, and Ashara Ekundayo from the Hub Oakland. Photo: Amy Ellinger.

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Sarah Baird explains New Dream’s Get2gether program, which hopes to connect neighbors and spur community action for better, more livable neighborhoods. Photo: Amy Ellinger

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Managing editor Tim Schuler (center, plaid) takes part in the Collaborative Communities session. Photo: Amy Ellinger.

3. Austin’s Sustainable Food Center

An unofficial tour of the festival was the one I received of the new Sustainable Food Center in Austin’s Chestnut neighborhood, a working-class community east of downtown. The nonprofit runs four weekly farmers markets in Austin and offers affordable cooking classes. Executive director Ronda Rutledge and the building design team explained all the benefits of the nonprofit’s new headquarters, which houses offices, a commercial kitchen, and support spaces for its various programs.

The building itself was beautiful, with reclaimed wood, earthen tiles, exposed particle board, and custom metal planters on its deck. On a second deck sat a large, custom-designed table where employees were eating lunch. Sited next to a new public transit stop, the building is part of a “social village,” a multi-building development whose tenants are socially conscious community organizations. Currently two of the three buildings are completed. A planned urban farm across the Metro tracks is underway.

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Austin’s Sustainable Food Center recently completed a 7,000-square-foot green building to house its many programs and community cooking classes.

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The view from SFC’s deck shows the site of the third planned building in the “social village” and its proximity to the MetroRail.

4. Thirst

On Wednesday, artists from Women & Their Work led a part-biking, part-walking tour from the Austin Convention Center to their installation of a work titled Thirst.

More than 300 million trees have died as a result of the recent droughts in Texas. As a way to raise awareness of this environmental devastation, the artists collaborated with architects and landscape architects to suspend a ghostly white tree above Lady Bird Lake accompanied by 14,000 white prayer flags, all printed with the silhouette of the tree.

To reach the artwork, attendees rode Tern folding bicycles, supplied by SXcycles, and passed by Austin’s decommissioned Seaholm Power Plant, soon to be the anchor of a new eco-district for the city.

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A dead tree is suspended above Lady Bird Lake to raise awareness about droughts and their impacts. Photo: Ben Aqua.

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The tree is accompanied by 14,000 prayer flags that radiate from this place and stretch 2.5 miles along the waterfront. Photo: Rich Merritt.

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A rendering shows the plan for Austin’s Seaholm EcoDistrict, which will make use of the decommissioned power plant.

That’s it for 2013! Stay updated on the details for SXSW Eco 2014 here.