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Water for millions at risk as glaciers melt away
David Adam, The Guardian
The world’s glaciers and ice caps are now in terminal decline because of global warming, scientists have discovered. A survey has revealed that the rate of melting across the world has sharply accelerated in recent years, placing even previously stable glaciers in jeopardy. The loss of glaciers in South America and Asia will threaten the water supplies of millions of people within a few decades, the experts warn.
Georg Kaser, a glaciologist at the University of Innsbruck, Austria, who led the research, said: “The glaciers are going to melt and melt until they are all gone. There are not any glaciers getting bigger any more.”
(11 Oct 2006)
The freshwater boom is over. Our rivers are starting to run dry
George Monbiot, Guardian
We can avert global thirst – but it means cutting carbon emissions by 60%. Sounds ridiculous? Consider the alternative
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It looks dull, almost impenetrable in places. But if its findings are verified, it could turn out to be the most important scientific report published so far this year. In this month’s edition of the Journal of Hydrometeorology is a paper written by scientists at the Met Office, which predicts future patterns of rainfall and evaporation.
…The models can be tested by means of what climate scientists call backcasting – seeing whether or not they would have predicted changes that have already taken place. The global climate model used by the Met Office still needs to be refined. While it tracks past temperature changes pretty closely, it does not accurately backcast the drought patterns in every region. But it correctly reproduces the total global water trends over the past 50 years. When the same model is used to forecast the pattern over the 21st century, it uncovers “a net overall global drying trend” if greenhouse gas emissions are moderate or high. “On a global basis, drought events are slightly more frequent and of much longer duration by the second half of the 21st century relative to the present day.” In these dry, stodgy phrases, we find an account of almost unimaginable future misery.
Many parts of the world, for reasons that have little to do with climate change, are already beginning to lose their water.
…As these two effects of climate change – global drying and rising salt pollution – run up against the growing demand for water, and as irrigation systems run dry or become contaminated, the possibility arises of a permanent global food deficit. Even with a net food surplus, 800 million people are malnourished. Nothing I could write would begin to describe what a world in deficit – carrying 9 billion people – would look like.
(10 Oct 2006)
A $3 Water Purifier That Could Save Lives
Donald G. McNeil Jr., NY Times
In very poor countries, the family that has to walk miles to fetch drinking water from a well or a stream may be the lucky one. In many villages, the water source is a filthy pond trod by animals and people, or a mud puddle out next to the yam field.
As a result, about 6,000 people a day – most of them children – die from water-borne diseases.
Vestergaard Frandsen, a Danish textile company that supplies water filters to the Carter Center guinea worm eradication program and mosquito-killing plastic tarps to refugee camps, has come up with a new invention meant to render dangerous water drinkable.
The invention is called Lifestraw, a plastic tube with seven filters: graduated meshes with holes as fine as 6 microns (a human hair is 50 to 100 microns), followed by resin impregnated with iodine and another of activated carbon. It can be worn around the neck and lasts a year.
Lifestraw isn’t perfect, but it filters out at least 99.99 percent of many parasites and bacteria, the demons in most fatal cases of diarrhea.
(10 Oct 2006)
