Ryan Childress (left), Dominion Energy’s director of gas business development, and Kraig Westerbeek, an executive at pork producer Smithfield Foods, stand on a plastic-covered manure pond in North Carolina.

Ryan Childress (left), Dominion Energy’s director of gas business development, and Kraig Westerbeek, an executive at pork producer Smithfield Foods, stand on a plastic-covered manure pond in North Carolina.