The Army Corps of Engineers says is final environmental impact statement recommends native-only oyster restoration efforts for the Chesapeake Bay. The decision had already been announced earlier this year, but the statement begins the final public comment period before the formal publication of the decision. The statement says agencies, including the Army Corps and the states of Maryland and Virginia, concluded introducing nonnative oysters posed unacceptable ecological risks. The Army Corps acknowledged uncertainty over whether restoration efforts will bring back the native oyster population and the possibility they will continue to decline. The Asian oyster had been touted as a fast-growing and disease-resistant alternative.