Tapio Vehmas invented a technique where the concrete swallows carbon

Gray there is. The road is dark gray, get a light gray, the sky in between.

Concrete by Rakennusbetoni and -lelementti Oy manufactures concrete along the Lahti -Hämeelinna road in Hollola. All surfaces of the factory are covered by gray dust.

In the very corner of the ordinary factory hall, very special concrete bumps harden. They are packed more carbon dioxide than their production has allowed the air.