Why are higher levels of these chemicals found in human beings?

Higher levels of certain chemicals, including pesticides, are found in human beings due to bioaccumulation and biomagnification in the food chain. When pesticides are used in agriculture, they may enter the soil and water, where they can be absorbed by plants. Small animals consume these plants, accumulating the pesticides in their bodies. As larger animals consume smaller ones, the concentration of pesticides increases through biomagnification. Humans, being at the top of the food chain, may consume products from various trophic levels, leading to the accumulation of pesticide residues in their bodies. Additionally, exposure can occur through contaminated air, water, and direct contact with treated surfaces. Prolonged exposure, dietary habits, and the persistence of certain chemicals contribute to higher levels in human tissues, raising concerns about potential health impacts, emphasizing the importance of monitoring and regulating pesticide use.