Researchers in China have been studying how certain plants can help clean up soil contaminated with heavy metals like copper, arsenic, and cadmium. They have found plant species that can absorb these metals, and have looked into how these plants tolerate and accumulate the metals. By understanding the processes involved, they have developed ways to make the cleaning process more efficient. Successful applications of this technology have been seen in real-world cases. This research has made a significant impact on the global stage, showing that phytoextraction can be a powerful tool for cleaning up polluted soil.