Over the past 100 years, Louisiana has lost more than 2,000 square miles of coastline due to climate change. State officials have attempted various solutions to reclaim the land, including levees, barrier islands, and artificial marshes. Now they want to divert part of the Mississippi River to flood the land and provide the necessary water and sediments to create marshes. The state has already set aside $1.3 billion to do it. Now the question is whether or not it will work.