Gasnetz Hamburg – green energy for the urban energy transition. With around 600 employees, the city owned company Gasnetz Hamburg operates the 7,900-kilometer-long natural gas grid with around 160,000 connections. The company began decarbonizing its gas supply several years ago. Via a feed-in plant in the port, the network takes climate-neutral biomethane into the grid, which arithmetically covers the heating energy needs of around 5,700 households. As a member of numerous research projects, Gasnetz Hamburg is driving forward the use of hydrogen. In an ongoing funded project, the company and its partners are testing the admixture of 30 percent H₂ in the heat supply of an entire housing estate. Gasnetz Hamburg is working with several industrial companies in the Hamburg Hydrogen Network to produce and import the green gas and use it in energy-efficient production processes and logistics. The connecting infrastructure for this purpose will be built by Gasnetz Hamburg from 2025 with the Hamburg Hydrogen Industrial Network HH-WIN. This H₂ grid will enable industry to replace a third of the natural gas consumed in Hamburg with climate-neutral hydrogen as early as 2030.