Yuan Tseh Lee, president of the International Council for Science, tells SciDev.Net what scientists must achieve at Rio+20.

The cities account for more than three quarters of emissions of CO2, are home to half the world population and will be 'highly visible' at 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.

Researchers are combining data in new ways to identify who is most vulnerable to climate change and population growth.

The recent nuclear scare in Japan has reinforced pressure in China to raise its awareness of the risks of new technologies. Li Jiao reports.

As International Day for Disaster Reduction nears, Rui Pinho, who leads the Global Earthquake Model, talks to SciDev.Net.

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

As Ug99, the deadly fungus blighting African wheat, marches eastward, scientists across the globe are scrambling for ways to outsmart it.

Scientists in the Democratic Republic of Congo don't have the resources to monitor the country's volatile volcanoes adequately.

Sian Lewis explains how remote sensing can be used to manage natural disasters and highlights ongoing efforts and obstacles.

Climate change is a reality in developing regions, who say the international community must not neglect better adaptation strategies.

Greg O'Hare explains the what, why, when and how of cyclones, and reviews their effects in South Asia.

Vietnam is protecting flood prone areas with barriers that make use of innovative technology.

Scientists are battling to stop damage and death caused by lightning strikes in the developing world, reports Anuradha Alahakoon.

Nepal is using plants and modern engineering to combat the landslides that regularly plague the nation. Badri Paudyal reports.

Dust storms in China have been increasing, but a project in Bayinhushu shows how to reduce them, reports Dennis Normile.

Today's maps are sophisticated tools, helping developing countries track everything from drought to disease, reports TV Padma.

Indonesia's mud volcano has so far been both a defeat and an opportunity for scientific understanding, reports David Cyranoski.

Protecting against the risk of shifting ground and replanting mangrove forests are some of the tasks ahead for tsunami-hit areas, reports Richard Stone.

In the aftermath of the October earthquake, Pakistan is struggling to ready itself for the next big one, reports Geoff Brumfiel.