La Nina, a weather phenomenon usually linked to heavy rains and flooding in the Asia-Pacific and South America and drought in Africa, has re-emerged and is likely to persist into early 2012, the Wo

La Nina, a weather phenomenon typically linked to flooding in the Asia-Pacific, African drought and a more intense hurricane season over the Atlantic, could occur in a weak form this year, the Worl

Five million people are at risk of cholera in drought-hit Ethiopia, where acute watery diarrhea has broken out in crowded, unsanitary conditions, the World Health Organization (WHO) said on Friday.

Cholera, an acute intestinal infection, causes watery diarrhea that can quickly lead to severe dehydration and death if treatment is not promptly given, according to the United Nations agency.

"Ov

Chrysotile asbestos will not be listed as a hazardous industrial chemical that can be banned from import after countries including Canada and Ukraine blocked consensus, a United Nations spokesman said Friday.

The decision was taken at a meeting of states that have ratified the Rotterdam Convention despite the treaty's scientific review body having recommended the inclusion of "white" asbestos o

Countries using nuclear energy must ensure their reactors are built to withstand multiple disasters after Japan's accident revealed gaps in safety standards, U.N.

Last year tied for the hottest year on record, confirming a long-term warming trend which will continue unless greenhouse gas emissions are cut, the World Meteorological Organization (WMO) said on Thursday.

The first 10 years of the millennium proved to be the hottest decade since records began in the 19th century, it said.

"The main signal is that the warming trend continues and is being st

The ozone layer that shields life from the sun's harmful rays is projected to recover from harmful chemicals by mid-century, but it will take longer over the polar regions, a United Nations study said on Thursday.

Ozone depletion -- blamed for higher ultraviolet radiation that causes skin cancers and cataracts and damages agriculture

-- will continue for decades as several key damaging subst