Well, do you know, they’ve quit burning wood in some places in the Eastern States? And what do you suppose they burn? Coal!” [He bent over and whispered again:] “There’s world—worlds of it on this land! You know that black stuff that crops out of the bank of the branch?—well, that’s it. You’ve taken it for rocks; so has every body here; and they’ve built little dams and such things with it
This quote is important because it shows a reliance on natural resources such as goal and the transformation from wood to coal( submitting again because previous response appears to not have gone through)