Five people, including two children, died and at least 47 others have been injured in the storm that is battering central Argentina, which was recently hit by the worst drought in the past 50 years, officials said Tuesday.
The world's marine ecosystems risk being severely damaged by ocean acidification unless there are dramatic cuts in CO2 emissions, warn scientists. More than 150 top marine researchers have voiced their concerns through the Monaco Declaration, which warns that changes in acidity are accelerating.

Mexico made a first shipment of sterile parasitic flies to Uruguay to help combat the cattle screw worm or Cochliomyia hominivorax, an insect whose larvae or maggots eat living tissue, and which has gradually spread from Brazil to the southern pastures of South America.

Plans to curb climate change by using plankton to draw carbon dioxide into the world's oceans have been boosted.

Landlocked Bolivia has declared a health emergency as a dengue fever epidemic spreads across much of the country. Health officials say it is the worst outbreak in 22 years and at least three people are known to have died from the disease.

The Paraguayan government admitted a low intensity dengue epidemics following 360 cases reported in hospital emergencies of which 179 remain highly suspicious of having been contaminated by the mosquito transmitted disease.

Unchecked global warming would leave ocean dwellers gasping for breath according to an article in the latest edition of Nature Geoscience. Dead zones are low-oxygen areas in the ocean where higher life forms such as fish, crabs and clams are not able to live. In shallow coastal regions, these zones can be caused by runoff of excess fertilizers from farming.

Bolivian officials have declared a health emergency after three deaths attributed to dengue hemorrhagic fever, the often-lethal form of a mosquito-borne disease that more than 1,000 Bolivians are thought to have contracted since November.

Water supplies for over a billion people around the world are under threat from increasing populations, expanding cities, industrialization, climate change and even the rising demand for food, warned the United Nations, as delegates from more than 60 countries kicked off a meeting today in preparation for the upcoming World Water Forum.

A study has revealed genetic links between people who inhabited northern Peru more than 1,000 years ago and the Japanese, according to reports from El Comercio from Lima, one of the country leading newspapers.