On 29 September a fourth leak was found on the Nord Stream gas pipelines, amid sabotage allegations that the two underwater pipelines running from Russia to Germany had been damaged by explosions recorded in the Baltic Sea. Russia and the West have traded blame over the mysterious leaks. The sea surface is bubbling up as gas escapes. While the pipelines were not operational during the alleged sabotage, they still contained natural gas. The incident raises fears of an environmental disaster. According to experts, the leaking methane will be the biggest burst of the potent greenhouse gas on record. ‘Whoever ordered this should be prosecuted for war crimes and go to jail’, said a university climate scientist.