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Destroyed Louisiana’s wetlands. The vegetation in marshes may not grow back The vegetation along water sources disappeared. The remains have turn brown Katrina destroyed oyster harvest by two-thirds Causing US to increase oyster imports fishermen found themselves unemployed. Floodwater became contaminated by household chemicals and affected underground gas and oil tanks leaking sewer and gas pipes increased contamination Human corpse and dead pets increased bacterial contamination. Dredged material will be used as a platform to grow plants. The Louisiana Coastal Area Ecosystem Restoration Plan to rebuild barrier islands and replant lost marsh grass.