Trefoil knot

Threedimensioanl trefoil knot: the core symbol for the culture of sustainism. Desiged by Joost Elffers. Published first in the 2010 Sustainism Manifesto (Michiel Schwarz & Joost Elffers, Sustainism Is the New Modernism: A Cultural Manifesto for the Sustainist Era, DAP Distributed Art Publishers, New York).
This and other sustainism symbols may be reproduced freely for non-profit use with the creative commons by-nc-nd license (www.creativecommons.org).