Abundance Threatened? Fish are abundant in Lake Turkana, the world’s largest desert lake. Photo by Jane Baldwin.   Over the last century, the construction of big dams to generate power, supply water and control floods has unleashed a damaging...

Lately, as I ponder our societal response, or lack of it, to the challenging times ahead – the droughts and floods and heat waves and crop failures, which we’ve tasted only as appetizers so far – I find myself...

Change usually happens very slowly, even once all the serious people have decided there’s a problem. That’s because, in a country as big as the United States, public opinion moves in slow currents.  Since change by definition requires going...