b

From 1850 to 1970, the team estimates net losses averaged about 30cm a year; between 1970 to 2000 they rose to 60-90cm a year; and since 2000 the average has been more than one metre a year. Last year the total net loss was the biggest ever, 1.3m, and only one glacier became larger. Worldwide, the vast majority of the planet’s 160,000 glaciers are receding, ‘at least’ as much as this, says Haeberli, probably more - a claim supported by evidence from around the world.
freshwater supplies are also threatened by evaporation in warmer temperatures, pollution and growing demand from a rising and more affluent population. And - like glaciers - snow and thus snowmelt is also declining in the same areas.



Author:
Robstroy
Time:
Monday, March 17th, 2008 at 8:16 pm
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