EditorialA pilot biogas refinery built by BiogasDT on La Almunia’s largest egg farm, Grupo Bailón, in Spain on May 16, 2023. (Emilio Parra Doiztua/The New York Times)
EditorialFritz Ullrich, the manager of Bio Energy Coevorden, a biogas plant acquired by Varo Energy, in Coevorden, Netherlands, April 4, 2023. (Ilvy Njiokiktjien/The New York Times)