Farmers and ranchers could not operate without the life-giving rays of the sun. Photosynthesis, the chemical process by which plants nourish themselves, could not take place without it. However, the sun can also bring misery, disease and even death, though all of this is ultimately preventable. Heat and ultraviolet solar rays can take a devastating toll on crops and livestock. The farm or ranch family can also be afflicted with serious problems, too.