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https://www.alojapan.com/1240366/fire-risk-at-osaka-expo-2025-site-as-methane-levels-detected-in-underground-area-raising-safety-concerns/ Fire risk at Osaka Expo 2025 site as methane levels detected in underground area, raising safety concerns #Japan #methane #Osaka #OsakaExpo #OsakaTopics #大阪 #大阪府 TOKYO, April 7 — A level of methane high enough to potentially ignite a fire was detected at the World Expo site in Japan, organisers said today, less than a week before the event opens. The gas was detected at an underground pit for electrical equipment during a test opening of the…