Several factors contribute to the variability in environmental concentrations:
Geographical Differences: Different regions may have varying levels of contaminants due to local industrial activities, agricultural practices, and natural resource deposits. Seasonal Changes: The concentration of certain chemicals can vary with seasons. For example, pesticide levels may be higher during planting and growing seasons. Weather Patterns: Weather events such as rainfall, temperature changes, and wind can influence the distribution and concentration of pollutants. Human Activities: Industrial emissions, waste disposal, and urbanization can lead to increased levels of contaminants in certain areas.
