Significant Figures by Peter Gleick

Archives for June, 2013

For some time now, proponents of the controversial practice of hydraulic fracturing or “fracking” have claimed there was little or no evidence of real risk to groundwater. But as the classic saying goes: “the absence of evidence is not evidence of absence” of a problem. And the evidence that fracking can contaminate groundwater and drinking…

With Matthew Heberger. This is a version of a post from the blog “Pacific Institute Insights“ How much water is there in America’s rivers, and where is it? Perhaps unsurprisingly, people have little sense of how their local water resources compare in size to other water resources. “Is that a big river? A little river?”…

There is a long history of conflicts over water – the Pacific Institute maintains an online, searchable chronology of such conflicts going back 5,000 years. There were dozens of new examples in 2012, in countries from Latin America to Africa to Asia.  (A full update for 2012 has been posted.) Access to water and the…

One day, sometime around the middle of this century, during the lifetime of people now alive, the population of the planet will be smaller than it was the day before. Global population growth is slowing, will level off, and one remarkable day, decline. This day will mark the dividing line – the definitive transition –…

The Nile River – river of legend – is not just a river in Egypt. It is the lifeblood of 11 different African nations and the longest river in the world, extending over 6,500 kilometers long and draining a watershed of over 3 million square kilometers. The eleven nations that share the Nile are Egypt,…