Global warming that is melting ice and snow will affect hundreds of millions of people around the globe by disrupting rivers in Asia, thawing Arctic ice and raising ocean levels, a U.N. report said on Monday. 

Glaciers from the Himalayas to the Alps are in retreat, permafrost from Alaska to Siberia is warming and snowfalls are becoming unreliable in many regions, according to a "Global Outlook for Ice and Snow" written by more than 70 experts.

 Source : Reuters News

And it said the changes, widely blamed on greenhouse gases released by mankind's use of fossil fuels, would be felt far from polar regions or high mountain areas.

"Fate of the world's snowy and icy places as a result of climate change should be cause for concern in every ministry, boardroom and living room across the world," said Achim Steiner, head of U.N. Environment Programme of the 238-page report.

He said the findings were relevant "from Berlin to Brasilia, and Beijing to Boston".

The report said that about 40 percent of the world's 6.5 billion population would be affected by retreating glaciers in Asia -- snow and ice in the Himalayas, for instance, help regulate river flows and irrigation from China to India.

And a one meter (3 ft 3 in) rise in world sea levels, linked to expansion of the oceans as they warm and melt from glaciers, could cause almost $950 billion in damage and expose 145 million people to flooding, it said.