You can conserve the amount of soil you have by simply being a good steward of it. this would consist of planting plants in a cycle so that the minerals and nutrients that one plant draws out of the soil, the other replaces.
two big R and two little r should be 50
Its 18 electron
1st orbital : maximum = 2 electrons
2nd orbital : maximum = 8 electrons
3rd orbital : maximum = 8 electrons
2+8+8 = 18 electrons
Explanation/Answer :Blood moves continuously through the body, delivering oxygen and other materials to cells and removing carbon dioxide and other wastes from cells.