This paper describes two case studies of smallholder farms in South Africa to assess the processes involved in agricultural innovation carried out jointly with farmers. It highlights the importance of experimentation and cooperation for cash crop and subsistence farmers, and reviews current policies to evaluate how grassroots innovation is being supported in South Africa.

The paper points to inadequate policy support for grassroots innovation. It outlines the characteristics of innovation systems including social contexts, learning cycles and self-reflection, and discusses intellectual property rights. The authors identify triggers for innovation, including the potential to cut down on labour, and suggest that policymakers and local communities need to engage in cooperative activities to create an enabling environment for grassroots innovation. Policy suggestions include creating links between formal and informal research and viewing collaboration as a key indicator of success.

This document is a draft of the international agreement to safeguard the Earth's resources, which will be used to create a final declaration at the UN Conference on Sustainable Development (Rio+20) taking place in Rio, Brazil later this year (20–22 June).

This 'zero draft' of the Rio+20 declaration, entitled 'The Future We Want', is based on more than 600 submissions from individual countries, civil society and nongovernmental organisations and other groups.

It outlines advances and setbacks on achieving sustainability since the 1992 Earth Summit, which also took place in Rio, calls for renewed political commitment and outlines a framework for progress towards the green economy. It also calls for support for scientific research and technology transfer in developing countries; strengthened global environmental governance; and sustainable development goals to replace the Millennium Development Goals by 2015.

The document includes an overview of the conference's vision, a framework for action, priority issues and proposals for strengthening implementation.