Drive around drought-devastated Northern California and you will invariably see cars with “Stop the Tunnels” bumper stickers. “Stop the tunnels” has also become a rallying cry in the United Kingdom, where politicians in London are scrambling to halt the sudden free-flow of immigrants using the Channel Tunnel to pour into England from Calais, France.
Two very different challenges related to age-old subterranean engineering solutions meant to transport resources from one place to another. Whether those resources are water, goods or people, tunnels are back in the news. Read more