Shma Design is one of the most popular landscaping firms in Bangkok, having been shortlisted at the World Architecture Festival for three years in a row. They’re also involved in some of the most exciting public projects in the city: Makkasan Park, Yannawa Riverfront and the new TCDC headquarters on Charoenkrung Road. Here, the firm’s co-founder and director, Yossapon Boonsom, 38, tells us why we need better-designed public spaces.