Debris and other discarded items often found on the ground or walkways are usually unlikely to do any harm to someone's bare feet.
Potentially hazardous' 600-foot asteroid detected near Earth after a year of hiding in plain sight
Outer space - Wikipedia
bare feet of a person on dry soil without plants close up - a Royalty Free Stock Photo from Photocase
Trading Lives for Profit: How the Shipping Industry Circumvents Regulations to Scrap Toxic Ships on Bangladesh's Beaches
Has an Old Soviet Mystery at Last Been Solved?
List of civilian radiation accidents - Wikipedia
MioTetto Soft Non-Toxic Baby Play Mat, Toddler Playmat, Colorful Jigsaw Puzzle PlayMat, 16+2 Bonus Squares Foam Floor Mats for Kids & Babies
Extremism: no victory in violence. No peace without development - Freedom From Fear Magazine (F3) by UNICRI Publications - Issuu
Radioactive waste - Wikipedia