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The Peak Oil Crisis: A Reality Check

October 30, 2014

For the last four or five years, we have been bombarded with a stream of stories about the “shale revolution.” Horizontal drilling and fracking, mostly in the U.S., were said to have released oceans of new oil and a...

© Sidney Harris

Paul Krugman and the Limits of Hubris

October 10, 2014

Economist Paul Krugman evidently feels irked and irritated by the notion that there might be limits to economic expansion: he has followed up his New York Times op-ed of September 18 (“Errors and Emissions,” to which I replied here)...

A view of the Picote Dam, a hydroelectric installation in Tras Os Montes, Portugal, on the Douro River. Credit: VOLKMAR K. WENTZEL/National Geographic Creative

Rivers Need a Thorough Health Exam

October 1, 2014

Rivers are the blue arteries of the Earth. Their flows deliver sediment and nutrients to floodplains, deltas and coastal zones, some of the most biologically productive ecosystems on the planet.  They connect and sustain the web of life. So...