There is an ongoing trend across the United States for athletic fields and playgrounds to install crumb rubber in lieu of natural grass surfaces. There are conflicting studies as to whether this material is safe and if continuous exposure can lead to cancer in those who use these play areas.
McEvoy, Dr. Sharlene A.
"On Dangerous Ground? The Turf War Over Crumb Rubber: Potential Liability for Manufacturers and Municipalities,"
University of Baltimore Journal of Land and Development: Vol. 7:
1, Article 5.
Available at: https://scholarworks.law.ubalt.edu/ubjld/vol7/iss1/5