For the third 2023 Graduate Thesis symposium, David Ruy proposes that object-oriented ontology provides a lens for critically engaging nature, sustainability and ecologically-oriented design. Ruy is followed by Timothy Morton (at 21:11), Enric Ruiz-Geli (40:37), and Shuruq Tramontini (59:57). At 1:16:39, the panelists discuss issues raised by the presentations with the audience and each other.