This collection of papers was presented at a conference on linkages between climate change, water, conflict and migration, held in September 2011 at The Hague, in the Netherlands, where the discussion focused on: capacity building and resilience in climate hotspots; conflict prevention; and a legal framework to protect environmental migrants.

The publication includes a conference summary and a background document providing an overview of how climate change, water stress and environmental problems are increasingly seen as major threats to human security. Also included are papers that explore connections between these issues from the perspective of vulnerability; put forward a research and capacity-building agenda for climate-induced migrations; and review current literature, evidence and implications for policymaking on the environment, climate change and human displacement.

This essay by Chunli Bai, executive vice president of the Chinese Academy of Sciences (CAS), explains the reasons behind the rapid progress of nanotechnology in China. A key factor, says Bai, has been "extraordinary" government support for the field since the early 1980s, which led to the creation of research institutes and significant grant money. But, cautions Bai, public communication on nanotechnology research, and ongoing monitoring and assessment of nanotechnology risks is needed.

This paper considers the potential role of 'innovation brokers' — intermediary organisations that help build links in innovation systems and facilitate multi-stakeholder interaction — in developing countries' agriculture. The authors suggest that to encourage organisations to take on this role, policies that encourage institutional learning and experimentation must be put in place. A first step must be mapping the strengths and weaknesses of the existing innovation system.