Ecological impact of tennis balls is out of bounds, environmentalists say - CBS News

Nearly all 330 million balls made worldwide each year eventually get thrown out, with most ending up in landfills for centuries.

Why Tennis Balls Are Harmful to the Environment? - EssentiallySports

On Second Thought Georgia Public Broadcasting

Tennis Ball Recycling Stanford All About No Waste Network

US Open: Tennis ball wasteland? Game grapples with a fuzzy yellow recycling problem

Environmental Impact of Tennis by Chase Dobra on Prezi

RecycleBalls: Giving tennis balls a second life through recycling

How Do I Recycle Used Tennis Balls?

Tennis Ball Recycling Stanford All About No Waste Network

Tennis ball wasteland? Game grapples with a fuzzy yellow recycling problem