In the natural world, balance is the key to everything. We cannot survive without water and yet, too much water can leave mayhem in its wake. Sun provides the energy necessary to sustain life. And yet, too much of it can cause harmful radiation and death. Carbon is the building block of life. And yet, too much carbon emission is one of the biggest threats in the world right now. Humans are nature's most amazing creation and yet, too many humans can destroy this natural balance and invite their own doom.
Nature is an incredibly complex machine connected through delicate balance of all its components. When we disturb those natural balances, we risk the efficiency or functionality of the whole machine.