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Introduction

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World Food Summit, 1996

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Science at Rio+20 by iStock/RapidEye

Latest on Rio+20

We track the news on science, technology and the Rio+20 Earth Summit
Radio satellite array - SKA Africa

SKA to be shared

The world's most powerful radio telescope, the Square Kilometre Array, will be shared between South Africa and Australia and New Zealand

From GM crops to forestry

Learn more about the challenges of feeding our growing population versus caring for our planet
Woman harvesting rice, Nepal - Flickr/Global Crop Diversity Trust

Goals for Rio+20

Colombian official Paula Caballero Gómez on why we need Sustainable Development Goals
Tunisian flag - Shutterstock

Reaching out

Tunisia wants to work with more developing countries — starting with India
African scientist studying bean disease - Flickr/CIAT International Center for Tropical Agriculture

Hard to agree

Latest from Rio+20 talks: The text is still too long and now it lacks science
Shri Y Mangi Singh from Manipur, India invented a kouna grass mat-weaving machine - SRISTI, Ahmedabad

Protecting inventors

The knowledge and innovations created by poorer communities need new models of rights protection, argues Anil Gupta
Mrs. Chabayanzara follows podcast instructions to draw cattle vaccine, Zimbabwe - Lawrence Gudza

No local input, no impact

Pushing technology won't work without engaging poor communities, says Lawrence Gudza
Women operating foot water pump in Kenya - Flickr/waterdotorg

Grassroots ignored

Policymakers overlook grassroots innovation — but need to get it on the development agenda, says Tony Marjoram