Learn about the hazards of pesticides

Pesticides carry more potential hazards to humans, pets, and the environment than many other common chemicals.

Pesticides are designed to kill living things. They are usually targeted to affect very specific groups of organisms, such as plants, fungi, or insects, and sometimes their activity is even more specific, affecting only certain genera or even species. 

The active ingredients in pesticides—the chemicals used to control the target pest—must be listed on the label by law. However, the so-called "inert" ingredients are not required to be listed in most cases.  Inert ingredients are used as carriers for the active ingredients; to help dissolve them, make them easier to apply, or to preserve them. Just because an ingredient is labeled "inert" doesn't mean it isn't harmful - in fact, some are quite dangerous.  The U.S. Environmental Protection Agency (EPA) has published a list of chemicals used as inerts, but the list doesn't indicate which products contain these.

Pests can also pose hazards to people. Some insects and mammals are vectors of deadly diseases, weeds can create fire hazards, and vegetation can create traffic hazards.

Pests also have environmental and public health impacts. For example, invasive pest species are a primary cause of global species extinction, and cockroaches are a common cause of childhood asthma.

There is no question that pests must sometimes be managed. Even in integrated pest management (IPM) programs, prevention and non-chemical management techniques aren't always enough to adequately control pests. In such cases, pesticides are required as a last resort.