Milk Design's contribution to the show, Nature Therapy - Hear, says Lee, "is a sound installation that allows users to experience nature - the sound of birds chirping and feeding - as a piece of sculpture." Made from wood, with a mechanical component that tilts the structure when birds or other animals land on it, this outdoor piece is a supersized toy that also draws attention to the healing effects of immersion in the sights and sounds of nature.

Also on view are images of Tunnel of Light, an installation in Japan's Kiyotsu Gorge Tunnel, designed by Beijing-based Ma Yansong of MAD Architects. The abandoned tunnel has been transformed into a frame for panoramic views of the gorge plus a series of enigmatic spaces where visitors become part of the installation.

In Ideology, local zero-waste retailer Slowood and neighborhood recycling center Green@Community are showcased alongside international enterprises including the Ocean Cleanup and Love Has No Labels.