Volcanic eruption. a solidified lava flow will devoid plants of necessary soils in which to grow.
Answer:
It will eventually become unsustainable because of factors like food, water, space, etc.
It is needed by all living things and every living cell to carry out life processes, such as breaking down and building up molecules, and transporting many molecules across cell membranes. The form of energy that living things need for these processes is chemical energy, and it comes from food.