| 2018 | Vaumarcus NE | Zero-Waste |
| 2017 | Rigi LU | Permaculture – Let’s Close the Loop |
| 2016 | Charmey FR | Urban Agriculture |
| 2015 | Prêles BE | Cell Phones – From Raw Material to Recycling |
| 2014 | Gänsbrunnen SO | Space Usage – Unlimited growth on limited space |
| 2013 | Hischwil ZH | Food today – you are what you eat |
| 2012 | Mariastein SO | Water castle Switzerland. How to continue? |
| 2011 | Mannenbach-Salenstein TG | What’s the taste of your energy mix? |
| 2010 | Lausanne VD | Environment and Economy – Incompatible? |
| 2009 | Richterswil ZH | Environmental protection – a luxury ?! |
| 2008 | Torgon VS | Labels – quality guaranteed? |
| 2007 | Hischwil ZH | Mobility – where are we going? |
| 2006 | Walkringen BE | Renewable energies: utopia or necessity? |
| 2005 | Randa VS | Climate change: risks to the environment and society |
| 2004 | Emibois JU | Agriculture, what future? |
| 2003 | Braunwald GL | Communication and mediation in environmental issues |
| 2002 | Grindelwald BE | Sustainability in the tourism |
| 2001 | Kandersteg BE | Water – the blue gold |
| 2000 | Mont-Soleil BE | Energies and environment |
ZERO WASTE ?
