Sustainability is the rate at which a resource depletion reduces the capacity of natural capital to provide the future natural income. As long as the draw down exceeds the rate of replenishment, the amount available will eventually shrink to zero - sustainability is destroyed.
Water is a polar covalent molecule.
Water is a bent (bent shape) molecule.
Eg: 2H2 + O2 ➡ 2H2O
This shows that sum of reproducts = sum of products.
Therefore, mass is conserved.
I hope this helps you.
