Searchhttps://www.spgroup.com.sg/search?tag=30-30-30 are building for Tengah new town will be 30 per cent more energy efficient, which contributes to the nation's climate goals Mr Liu Yue inside one of the thermal storage tanks in the world's largest underground district cooling network operated by SP Group PHOTO: SP GROUP PUBLISHED NOV 30, 2022, 4:00 AM SGT