VIDEO: Kate Orff: Reviving New York's rivers -- with oysters!

Architect Kate Orff sees the oyster as an agent of urban change. Bundled into beds and sunk into city rivers, oysters slurp up pollution and make legendarily dirty waters clean -- thus driving even more innovation in "oyster-tecture." Orff shares her vision for an urban landscape that links nature and humanity for mutual benefit.

Kate Orff asks us to rethink “landscape”—to use urban greenspaces and blue spaces in fresh ways to mediate between humankind and nature.