Space programmes can assist development work but are they taking cash better spent on ground-based efforts? Talent Ng'andwe investigates.

SciDev.Net talks to ASSAf's Roseanne Diab about the role of science academies in climate change awareness and risk reduction.

Satellite images are making the fate of the Himalayan glaciers clearer, but not that of the people who live downstream, finds Smriti Mallapaty.

S. Romi Mukherjee outlines human rights-based approaches to science, technology and development, and what they mean for policy and practice.

How will science and technology fare at the Rio+20 summit? Aisling Irwin looks at scientists' demands and assesses their chances.

Promises made at previous summits have not delivered enough protection for the oceans — campaigners are pushing for better results from Rio+20, writes Prime Sarmiento.

'Blue carbon' is seen as an increasingly important issue, but it needs to be backed up by better science, reports Mićo Tatalović.

SciDev.Net speaks to UN Environment Programme executive director Achim Steiner at the Eye on Earth Summit (12-15 December) about next year's Rio+20.

A preparatory meeting for the Rio+20 summit will discuss open access environmental data with a focus on biodiversity, water, oceans, cities and disasters. Yojana Sharma reports.

Nuclear power promises clean energy for developing countries. Dave Elliott charts its progress and prospects after the accident at Fukushima.

Laura Hood summarises the latest data on the world's biodiversity, with facts and figures on its value and efforts to conserve it.

Climate change will affect the water security of developing countries. Lucinda Mileham explores their priorities as they struggle to cope.

Getting the right technology into poor countries is crucial for fighting climate change but how should we go about it? T. V. Padma investigates.

Hannah Chalmers gives the low-down on how reducing emissions from deforestation can play a central role in tackling climate change.

Locking carbon away as charcoal in the soil could help to mitigate climate change but whether it will work in practice remains a mystery.

Growing forests might be easy but getting developing-country forests onto the carbon market is proving more difficult.

Yvo de Boer, the UN climate chief, speaks to SciDev.Net about getting clean technology into the developing world.

The UN supports forest protection in the next climate agreement, but questions on how to tackle deforestation are still being debated.

Scientists in the Himalayas are battling poor resources to protect the area from the effects of climate change. T. V. Padma reports.