New Scientist: Maybe the Mississippi river delta isn't doomed after all. Upstream dams on the rivers that run through the delta were thought to be starving it of the sediment it needs to stay above sea level -- but now it seems there's enough sand to feed the delta for centuries to come.
The Mississippi river delta, home to 2 million people and the largest tonnage shipping port in the US, is vulnerable to flooding -- the city of New Orleans, which lies on the delta, was famously inundated...