City planners can find a way to use existing evidence and deal with uncertainty in designing strategies for climate change adaptation.

Rio+20 is an opportunity to focus on harnessing scientific evidence and good governance to improve the management of water resources.

Scientists can help smallholder farmers get more out of their crops in changing food markets.

Scientific collaborations can build trust and facilitate progress in nuclear arms control and disarmament.

A four-step plan to help governments integrate adaptation to climate change into development planning and policy.