Pollution: Pollution refers to the presence of harmful substances or contaminants in the environment that cause adverse effects on ecosystems and human health.
Toxicity: Toxicity refers to the degree or extent to which a substance is capable of causing harm or damage to living organisms.
Bioaccumulation: Bioaccumulation is a process by which certain substances accumulate within an organism's tissues over time, often at higher concentrations than found in their surrounding environment.