Humans really haven't figured out a cheap way to dig a lot of dirt yet. It's also painfully slow. It's about $175 per cubic meter if you have a huge project an

Humans really haven't figured out a cheap way to dig a lot of dirt yet. It's also painfully slow. It's about $175 per cubic meter if you have a huge project and are able to benefit from any economies of scale. A cubic meter is about 1.5 tons of soil. And then you've got to truck all that dirt somewhere.