SciDev.Net

Many new technologies have promised to remove arsenic from drinking water but little has changed on the ground, finds T. V. Padma.

Persuading Cambodian river-dwellers to use a newly designed floating toilet instead of the river could cut soaring diarrhoea rates.

Nanotechnology could help give millions clean drinking water. David J. Grimshaw outlines the potential, the progress and some of the risks.

Can nanosponges solve a continent's water contamination problems? Munyaradzi Makoni investigates.

Is hydroponics — a system using no soil and very little water — a route to increased food security? Some Cape Verdean farmers think so.

The Tibetan plateau is feeling the effects of climate change, with glacial retreat and permafrost degradation among the effects.

A low-tech clay water filter is proving successful in Sri Lanka, cutting disease levels and saving on fuel costs.

Climate change threatens food crops across the world. Now scientists are re-focusing their efforts on crop resilience, rather than yields.

Anthony Patt, Laban Ogallo, and Molly Hellmuth look back over ten years of Climate Outlook Forums for rainfall prediction in Africa.

Controlling the amount of pollution that goes into China's Taihu Lake is the key to managing the algal blooms, writes Lucie Guo.

Faced with a changing climate, projects to help Africans adapt are springing up across the continent, reports Patrick Luganda.

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

The plunging shorelines of islands in an Indian archipelago are key to a novel desalination process, reports Yudhijit Bhattacharjee.

Uganda is planning a new dam on the Nile, but critics say smaller, cheaper options have not been given a chance, writes Xan Rice.

Tim Hirsch reports on a method of extracting methane from hydroelectric dams to significantly reduce greenhouse gas emissions.

The slow response of South Asia to the crisis triggered by arsenic-laced water has cost thousands of lives, reports Yudhijit Bhattacherjee.

Scientists have embarked on an ambitious plan to restore the ecosystems of Brazil's Atlantic rainforest devastated by deforestation, reports Bernice Wuethrich.

Lucy Williamson reports on the problems faced by a project to rehabilitate Indonesia's depleted peatland rainforests.

Tropical reservoirs might release more greenhouse gas than fossil-fuel power stations — a potential blow to future hydropower projects.

Flood-prone Asian nations are starting to share information that could help save lives but this exchange needs to be more open to be effective, reports Navin Singh Khadka.