A company in India has created carbon tiles from polluted air. A filtered device is used to capture carbon soot from diesel exhaust and fossil fuel generators. It removes contaminants such as heavy metals and dust from the soot, and creates a powdered form of purified carbon. The powder is then mixed with cement and marble waste from quarries to produce stylish, handcrafted building tiles. The company aims to have each tile contain at least 70% waste material.