All substances used to eliminate or manage pests are collectively referred to as "pesticides," including insecticides (insecticides), fungicides (fungi), and herbicides (weedicides). One of the main supporters of the green revolution sought ways to improve and utilized suitable pesticides to control the wide range of insect and plant pests that have a detrimental impact on the quantity and quality of the world's food supply. This review looks at pesticide categories, toxicity, deciding variables, pesticides in water supplies, contaminated soils, impacts on human health, and techniques for detection, removal, and repair. Furthermore, this essay contrasts the analytical techniques used to measure the very low concentrations of pesticides, as well as gives a concise overview of the separation procedures utilized for pesticide examination. Finally, our research suggests that new technologies for detecting pesticide residues and other very harmful pollutants be developed. Both severe, or simple, and persistent, or hard, unfavorable health effects can arise from the use of pesticides, and they can manifest months or years after administration. The goal of this project is to demonstrate the detrimental effects of chemical pesticides, as well as their repercussions on the environment and people's health in Iraq. We could conclude that incorrect use of these substances might be harmful in the short- or long-term. Governmental agencies in charge of these materials should pursue alternate control strategies to decrease the danger and abuse of these compounds. Taking into account that educating the public about the dangers of pesticides is a crucial part of preserving improved both the environment and health in Iraq, that might be better and have no adverse effect on health and the environment.