Toxic elements refer to substances that are harmful to living organisms in certain concentrations or forms. These elements can be natural or anthropogenic in origin and can have harmful effects on human health and the environment. Examples of toxic elements include heavy metals such as lead, mercury, cadmium, and arsenic. Research in this area focuses on understanding the sources, distribution, mechanisms of toxicity, and potential health effects of these elements, as well as developing strategies to mitigate their impact on human health and the environment. Studies may involve evaluating exposure levels, assessing risk factors, and developing remediation techniques to reduce toxic element contamination.