Elon Musk, the founder of Tesla and SpaceX, plans to use mud excavated by his tunnel-digging enterprise, the Boring Company, into a cheap building material. “In typical tunneling projects, excavated dirt is shipped offsite to disposal locations. This process is costly, time-consuming, noisy, and can be environmentally hazardous. The Boring Company is investigating technologies that will recycle the earth into useful bricks to be used to build structures.”
This is not a new concept, as buildings have been constructed from Earth for thousands of years including, according to recent evidence, the Pyramids. These bricks can potentially be used as a portion of the tunnel lining itself, which is typically built from concrete. Since concrete production accounts for 4.5% of the world’s greenhouse gas emissions, earth bricks would reduce both environmental impact and tunneling costs.
Elon Musk established The Boring Company to dig large network of low cost tunnels to fix traffic congestions in cities. Musk believes that the only other option to avoid traffic congestions in cities is to invent flying cars. However, digging tunnels would be much cheaper than making flying cars. “Flying cars have issues with weather, noise, and generally increase anxiety levels of those below them. The other option is to go down and build tunnels.”