I was saying that in the scale of human enterprises, the cost of returning soil from another planet is a rounding error. 9 billion over a decade vs the operatin

I was saying that in the scale of human enterprises, the cost of returning soil from another planet is a rounding error. 9 billion over a decade vs the operating cost of O&G industry as an example, isn't even close. Soil from Mars vs oil from earth. Both are an amazing scientific and technological accomplishment, but one is also historic.