Seven 3D-printed houses that have been built around the world

A Dutch couple recently became the first people in Europe to move into a 3D-printed home, so we have rounded up seven examples of 3D-printed houses from around the world.
3D printing has long been hailed as a potential solution for quickly and efficiently building housing, and this promise is now becoming a reality.
Here are seven examples of 3D-printed homes that have already been built, including a bio-plastic micro home and a house printed from a mixture of soil, straw and rice husks.
Bio-pla