The expiration of that legislation renews the debate on just how much of an impact those farms have on North Carolina's rivers. Neuse riverkeeper Larry Baldwin says he hopes political debate surrounding hog farming's environmental impact strikes a chord with people again. Hog farmer Chuck Stokes is a pioneer in new waste treatment technologies, which right now are very expensive. Stokes says he and other farmers are working with politicians and watchdog groups like environmental defense to make that technology more affordable to farmers. Meanwhile, Baldwin argues hog farming is the single largest polluter of waterways in Eastern Carolina. Legislation introduced Tuesday by state representative Carolyn Justice would establish permanent environmental standards for managing hog waste. The bill also seeks to provide fifty million dollars for a cost-share program to make new disposal systems more affordable for farmers.