Metal enrichment refers to the process by which certain elements or compounds, commonly metals, accumulate in a particular environment or ecosystem at levels higher than normal background concentrations. This can occur naturally through geological processes or as a result of human activities such as mining, industrial pollution, or agricultural practices. Metal enrichment can have harmful effects on ecosystems and human health, and is a key focus of environmental research and monitoring efforts. Scientists study the sources, transport, and impact of metal enrichment in order to develop strategies for mitigating its effects and protecting environmental and human health.