Metal resources refer to naturally occurring materials that contain valuable metals, which can be extracted and processed for various uses. Common examples include iron, copper, aluminum, and gold. These metals are essential in industries such as construction, electronics, and manufacturing, contributing to economic development and technological advancement. The extraction of metal resources typically involves mining, where ores are removed from the earth and then refined to obtain the desired metals. Sustainable practices are increasingly important in this field to minimize environmental impact and ensure that metal resources are available for future generations.