Researchers tested whether mixing coconut fiber biochar with contaminated mine soil could help plants called Sanvitalia procumbens clean up heavy metal pollution. The plants absorbed less toxic metals when grown in the biochar-amended soil, grew bigger, stayed healthier with more green coloring, and experienced less genetic damage. Using this natural byproduct from coconut processing as a soil amendment proved to be an effective and sustainable way to reduce heavy metal contamination risks to the environment and food chain.