How They Build Tunnels To Be Disaster Proof | Built From Disaster | Spark

How evacuation systems and fireproof concrete are now being incorporated into tunnel design in an attempt to save lives in a disaster. Subscribe to Spark for more amazing science, tech and engineering videos - https://goo.gl/LIrlur Follow us on Facebook: https://www.facebook.com/SparkDocs/ Follow us on Instagram: https://www.instagram.com/spark_channel/?hl=undefined Content licensed from TwoFour Group to Little Dot Studios. Any queries, please contact us at: owned-enquiries@littledotstudios.com #spark #sparkdocumentary #sciencedocumentary