Significant Figures by Peter Gleick

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Snow. Glaciers. Icecaps, River flows. All of these are vulnerable to climate change, especially rising temperature. This isn’t just theory. It’s now observable fact.   Scientists worry about the growing threat of climate change because the global climate is tied to everything that society cares about: human and environmental health, food and industrial production, water availability, extreme…

The latest in a long series of science summaries on climate change from the Intergovernmental Panel on Climate Change (IPCC) has just been released. While the report has a massive amount of information in it, related to a wide range of geophysical implications of climate change, here are some of the key water-related findings for…

Peak Water in the American West

  It is no surprise, of course, that the western United States is dry. The entire history of the West can be told (and has been, in great books like Cadillac Desert [Reisner] and Rivers of Empire [Worster] and The Great Thirst [Hundley]) in large part through the story of the hydrology of the West,…

The evidence from real-world observations, sophisticated computer models, and research in hundreds of different fields continues to pile up: human-caused climate change is already occurring and will continue to get worse and worse as greenhouse-gas concentrations continue to rise. Because the climate is connected to every major geophysical, chemical, and biological system on the planet,…

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,…

The planet has passed a disturbing landmark, a marker on a continuing highway to climate disruption. On May 9th, the NOAA and the Mauna Loa observatory reported that atmospheric CO2 levels touched 400 parts per million. Before humans started burning fossil fuels, they were around 280 parts per million.   The last time atmospheric CO2…