Pesticides are chemical substances used to prevent, control, or eliminate pests, including insects, weeds, fungi, and other organisms that can harm crops, livestock, or human health. They are categorized into several types, such as insecticides (targeting insects), herbicides (targeting weeds), fungicides (targeting fungi), and rodenticides (targeting rodents). While pesticides can enhance agricultural productivity and protect public health, their use also raises concerns about environmental impact, potential harm to non-target species, and human health risks, leading to ongoing discussions about regulation and safe usage.