2025 World Expo Osaka to display carbon-capturing concrete dome


(photo: 2025 World Exposition)

The 2025 World Exposition in Osaka will exhibit a dome made from a new form of carbon-capturing concrete, with the potential to make a huge impact in greening the construction sector, which currently make up for about 40% of greenhouse emissions worldwide.

The special concrete hardens by capturing CO2 in the air and will reduce carbon emissions in its construction phase by 70% compared with a structure built with conventional concrete, according to construction company Kajima Corporation.

The construction of the 5.45-meter tall, oval-shaped dome, with a width of up to 23 meters, comes as the Japanese government aims to reach net-zero emissions by 2050.

"We would like to develop more new technologies by using the expo as a point of start," said an official of Kajima. The Japanese general contractor plans to begin the construction of the dome in mid-April, aiming for completion in November.

The dome is expected to be utilized as a venue for educating on environmental issues during the expo, scheduled for April 13 to Oct. 13 in 2025 on Yumeshima, an artificial island in Osaka Bay.

In the meantime, Britain revealed earlier this month the design of its pavilion, themed "Come Build the Future," making it the final member of the Group of Seven countries to unveil its design.

Julia Longbottom, the British ambassador to Japan, said that the pavilion from Britain will feature displays focusing on renewable energy, drug discovery, as well as museums and contemporary art.

According to the expo organizer, the pavilion will reuse materials used in both the 2012 London Olympics and the 2021 Tokyo Games, allowing for their relocation and utilization in other events after the expo.

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