Piedmont Natural Gas seeks to help North Carolina customers offset their carbon footprint through new green energy program - Program would allow customers to purchase blocks comprised of both the favorable environmental qualities of renewable natural gas and carbon offsets. - Customers can participate in the program beginning at $3 per month. News provided by Share this article Share this article CHARLOTTE, N.C., March 15, 2021 /PRNewswire/ -- North Carolina residential and small business customers of Piedmont Natural Gas may soon have the opportunity to participate in a new carbon footprint-reducing, green energy program to offset their personal natural gas usage. Piedmont announced today it has filed with the North Carolina Utilities Commission a request to implement this green program.