tennis ball: Tennis balls may take 400 years to decompose; Environmentalists, game's governing body clueless - The Economic Times

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

Bulletin Daily Paper 08/25/10 by Western Communications, Inc. - Issuu

Why Tennis Balls are an Environmental Disaster

TENNIS BALL AFTERLIFE – Defender

US Open Recycles Used Tennis Balls - TENNIS EXPRESS BLOG

RecycleBalls: Giving tennis balls a second life through recycling

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

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

What happens to the one billion tennis balls used each year?