e² design is an ongoing PBS series about the pioneers and innovators in the field of sustainable architecture, and how their work is producing solutions to pressing environmental and social challenges. Now entering its third season, the series features compelling stories from around the globe: Beijing to Nova Scotia, Ladakh to New York. Each episode examines the built environment's effects — both ecological, and social — and the design innovations that can reduce buildings' contribution to climate change. e² design is narrated by Brad Pitt.

• Brad Pitt