An invasive plant called hydrilla is spreading from the Piedmont toward lakes near the coast.
Biologists say the aquatic weed first found in Wake County is now on river banks in northeastern North Carolina and in lakes near Wilmington. Dr. Rob Richardson is a crop science professor at N.C. State University. He says the plant grows in thick patches, which can cause problems in drinking water supplies.
"Large mats have, at times, clogged turbines," says Richardson.