“People think the house would smell because the blocks are made of all-natural products, but it doesn’t,” says Kristine Haukongo. “Sometimes, there is a small touch of wood, but otherwise it’s completely odourless.” Subscribe to The Guardian on YouTube ► http://bit.ly/subscribegdn Haukongo is the senior cultivator at the research group MycoHab and her job is pretty unusual. She grows oyster mushrooms on chopped-down invasive weeds before the waste is turned into large, solid brown slabs –