San Antonians involved with eco-friendly sustainability and placemaking highlighted their projects, and promoted the city's potential, at a unique conference in Austin earlier this week. South by Southwest (SXSW) Eco is the three-day, ecology-centric version of the nearly two-week-long multimedia festival held each March. By design, SXSW Eco, held every fall, is smaller in scale and draws way fewer attendees than its spring counterpart.