The Louisiana Department of Natural Resources, the U.S. Army Corps of Engineers, the U.S. Environmental Protection Agency, and state and federal agencies aim to reverse the destruction with a $14-billion, 30-year wetland restoration plan called Coast 2050. A key to its success will be pumping sediment from the Mississippi River through huge pipelines into surrounding marshes and swamps. Over decades, this will fill in open areas and stimulate the spread of native vegetation. In the short term, however, biologists are identifying wetland flora that can adapt to saltier, deeper water. So far, efforts to rejuvenate damaged areas with these plants have been slow going. That's because the typical method for wetland restoration is to plant grasses and trees by hand-a process that is both tedious and expensive.