Answer: Baltic Sea
Notes: A United Nations Environment Programme (UNEP) study revealed that the 2022 Nord Stream pipeline explosions caused the largest human-induced methane release ever recorded. Nord Stream is a key natural gas pipeline under the Baltic Sea, connecting Vyborg, Russia, to Lubmin near Greifswald, Germany. It is a twin pipeline system designed to ensure energy security for Europe, especially Germany. The pipeline provides a direct and reliable gas supply from Russia, bypassing transit countries.
