Water covers over two thirds of earths surface. Yet water shortages are a major problem for many people around the world. Why do u think this is the case? please answer

Explanation:

I think it's from over population and global warming and we can't completely drink sea water

I hope it helps

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of carbon is as shown here in the image.

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).