A potentially explosive level of methane gas was detected at the World Exposition venue in Osaka less than a week before the event's opening on Sunday, prompting the organizer to step up safety measures.The Japan Association for the 2025 World Exposition said flammable gas exceeding safety limits was discovered on Sunday in an underground space for electrical equipment in the Green World construction area on the artificial island of Yumeshima.When the covering was opened for ventilation, the gas concentration fell below safety standards. The day marked the final rehearsal to check facility …READ FULL ARTICLE