The ultimate eco building - made of salt, sunflowers and recycled urine

Its door handles are made of salt. Its walls are made of sunflowers. Its furniture is made of Japanese knotweed. And it was stained with dyes made with filtered urine. Is this recycling marvel in southern France the future of architecture?In a former railway repair shop in the southern French city of Arles, flasks of lurid green algae are bubbling away on a shelf, in a room that looks like a cross between a modern-day laboratory and a witch's potion-brewing den. Nearby, a 3D printer spews out curious objects made from algae-based bioplastic, while samples of algae-dyed textiles hang on a rack. Some of the walls appear to be made of rice cakes, others look like Weetabix, while some are daubed with a coat of porridgy gloop. All are natural byproducts of the local sunflower industry, the mashed-up pith and fibres redeployed as acoustic insulation. Elsewhere, there are antibacterial door handles made of salt, harvested from the region's salt marshes; thermal insulation made from bales of local rice straw; and bathroom tiles made of waste clay from a nearby quarry.You've heard of farm-to-table food? Well, this is farm-to-building architecture: the latest low-carbon weapon in the battle against the climate crisis. "We call it bioregional design," says Jan Boelen, artistic director of Atelier Luma. Given that the built environment accounts for around 40% of global CO2 emissions, he argues it is time we embraced locally sourced, organic methods of construction. "We need to move from globalised, extractive supply chains towards regional ecosystems of materials that help regenerate the environment. Where others might see waste, we see opportunities." Continue reading...