The end to the massive oil leak in the Gulf of Mexico has stanched the biggest US environmental crisis ever, but Louisiana must now determine just how bad the lasting, long-term damage is. Oil contamination is just one in a long list of problems afflicting the coastal marshes that have been in danger for decades. Every year, erosion gains ground on Louisiana's wetlands, which provide an essential buffer from hurricanes and flooding, and supply a third of the nation's seafood, and a third of its oil and natural gas.Duration: 02:13
