<human>: What's an argument against the use of pesticides?
<bot>: An argument against the use of pesticides is that they are harmful to humans, animals, and the environment. Pesticides can have negative effects on human health such as headaches, nausea, dizziness, fatigue, skin irritation, breathing difficulties, and cancer. They can also harm beneficial insects and other wildlife. Additionally, pesticide runoff into water sources can contaminate drinking water supplies, which poses a threat to both humans and animals.