When you step on bugs they crunch because their skeleton is on the outside of their body. Insect bites/stings cause 500,000 people to be admitted to the emergency room. Almost two million Americans are allergic to stinging insects. Without pest control, farmers would be in danger of losing over ½ their crops because pests could consume that much. Without pest control services, food sanitation, regulation, and health regulations would not be possible. There are 3,000 different kinds of insects — that is more than all the other plant and animal species combined. With all of the variety of insects, only 1% are considered to be harmful to humans.