Note: The answer can be more than one. Source of pollutants √ Solubility of pollutants The type of pollutants The particle size of pollutants The level of exposure to pollutants

The factors that affect the toxicity of pollutants are:* **Source of pollutants:** The source of a pollutant can significantly impact its toxicity. For example, pollutants released from industrial processes may have different chemical compositions and properties than those released from natural sources.* **Solubility of pollutants:** The solubility of a pollutant in water or other solvents determines how easily it can be absorbed by organisms and transported through the environment. Highly soluble pollutants can be more readily absorbed and cause greater harm.* **The type of pollutants:** Different pollutants have different toxicities. Some pollutants are highly toxic even at low concentrations, while others are less toxic but can still cause harm at higher concentrations.* **The particle size of pollutants:** The size of pollutant particles can affect their toxicity. Smaller particles can be inhaled more easily and reach deeper into the lungs, potentially causing more severe health effects.* **The level of exposure to pollutants:** The duration and intensity of exposure to a pollutant can also influence its toxicity. Prolonged exposure to even low levels of pollutants can lead to health problems, while short-term exposure to high levels can cause acute toxicity. It's important to note that these factors can interact in complex ways, making it difficult to predict the exact toxicity of a pollutant in a given situation.