National Wildlife Federation Hurricane Katrina Anniversary Report Card: “Two years after Hurricane Katrina much has become clear. We know that the devastation in New Orleans and surrounding areas was less a natural than a man-made disaster. Katrina’s surge into New Orleans was the direct result of poorly constructed levees, an ill-conceived navigation channel, and the destruction of millions of acres of coastal wetlands. Furthermore, the storm’s intensity itself was fueled by unusually warm waters in the tropical Atlantic due, in part, to global warming pollution.”