Answer:
They built new paved roads so that a greater number of dump trucks could remove the excavated earth. They sprayed insecticides to kill mosquitoes and built concrete locks to raise ships to a higher elevation.
Explanation:
Indiana grew four times in population between 1830 and 1860.
illionios grew 11 times between 1830 - 1860, little extra fact, :)
<span>It is where horses were domesticated. Hope this helps you out (though it's a little late) ^-^
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