Consultant news editor, SciDev.Net
When world leaders kicked off their three-day meeting this morning they watched this video below, to remind them why they are here. It was produced by the International Geosphere Biosphere Programme and premiered at the Planet Under Pressure meeting in London last March.
This blog post is part of our coverage of Rio+20: United Nations Conference on Sustainable Development. To read news and analysis on Science at Rio+20 please visit our website.