AdvertisementTo Fight Coastal Damage, Louisiana Parishes Pushed To Sue Energy Industry03:38Download AudioResumeJanuary 23, 2017Tegan WendlandfacebookEmailWetlands and marshlands that once protected New Orleans and the surrounding areas from storm surge have been depleted over the years. Here, the $1.1 billion Lake Borgne Surge Barrier outside New Orleans in 2015. (Getty Images)