Ocean acidification caused by human activities is likely to hit the Caribbean and west tropical Pacific regions the most.

Pacific islanders are at much higher risk of ciguatera fish toxins than previously thought, and the number of sufferers is increasing.

Researchers have engineered microorganisms to break down the sugars in seaweed into ethanol, creating a potential new source of renewable fuel.

With the help of scientists, indigenous communities of Suriname have discovered that mercury pollution affects 58% of their population.

Ordinary shoppers in Benin and Ghana say they would pay extra for organically grown, rather than chemically treated, vegetables, a survey has found.

A new book on the vulnerabilities of Pacific island fisheries to climate change finds that although some will benefit more are at risk.

Africa's farmers need more extension workers, but new technologies could replace some services, a meeting has heard.

A study on arsenic contamination suggests that the problem lies with aquifers, not with man-made ponds.

Researchers have combined genetic and location data to track typhoid fever — a technique that could be used for other diseases.

Recycling old banana plants to make compost could help boost crop yields while reducing fertiliser use, says a study.

A report has warned that the environmental hazard of the Marlin mine in Guatemala outweighs the profits for local communities and the country.

Natural sediment that mops up arsenic may keep deep groundwater cleaner than was thought, a study finds.

Implementing measures to reduce nitrogen and phosphorus runoff is key to controlling algal blooms, researchers say.

Spraying algal blooms with cheap, locally-available 'ball clay' forces them to the bottom of the sea, say researchers.

A single global research strategy to tackle environmental change and sustainable development has been agreed.

Chinese and Indian plans to use batteries to store solar power could drive up lead emissions.

Plastic bottles coated in a common chemical can cheaply and effectively rid water of arsenic, a study has found.

Two inventions aimed at providing better latrines and safer drinking water in Cambodia are among 60 competing for the INDEX awards.

Mollusc fisheries in Haiti and several African countries are at most risk from increasing ocean acidification.

Genetically engineered bacteria that mop up mercury may provide a cheaper and better alternative for cleaning contaminated water.