Carbon Negativity is the reduction of a carbon footprint to less than neutral. So it has the effect of removing carbon dioxide from the atmosphere rather than adding it. Interface have created a concept tile, which was inspired by nature. They used caster beans for the yarn, when you press castor beans into an oil and created the yarn from that because castor beans are very good for locking in carbon. For the backing, they used trees as they’re also good for locking in Carbon.