On the occasion of the 20th anniversary of the Chornobyl nuclear disaster, the Heinrich Böll Stiftung (Berlin), Ecoclub (Rivne, Ukraine), The Greens/EFA in the European Parliament, the Nuclear Information and Resource Service (Washington, DC), the World Information Service on Energy (Amsterdam), IPPNW (Germany) and Bündnis 90/DIE GRÜNEN (Germany) invited independent scientists, environmentalists, non-governmental organizations and sustainable energy experts from all over the world for the international conference „Chornobyl+20 – Remembrance for the Future“ that took place in Kyiv/Ukraine on April 23-25, 2006.