Rodents are one of the major causes of damage to crops and electrical systems throughout the world. With their ever-growing teeth, rodents, such as rats and mice, are constantly gnawing on things and are able to chew away at power lines that provide people with electricity. As carriers of contagious diseases and hosts of infectious parasites, rodents also contaminate food supplies and spoil gardens throughout Third World and industrialized nations.
With their ability to crawl through pipes and slip into hard-to-reach areas, rodents come into contact with sensitive circuitry that connects to power grids in towns and cities everywhere. Using their sharp incisors, the critters gnaw at electrical wires and insulation materials, causing short circuits and sparking fires in the process. The older a rodent grows, the stronger its teeth become, hence the need to chew on hard objects.
As carriers of pests, rodents bring along fleas, mites, and ticks with each infestation. Rodents are also carriers of diseases, and there are many that are transmittable to humans, pets, and farm animals; examples include leptospirosis, salmonella, tapeworms, and tuberculosis. The rodents are also contagious for what they leave behind, like urine, droppings, and saliva — all of which can be disease-ridden themselves.