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

UAH Global Temperature Update for March, 2017: +0.19 deg. C - Roy Spencer, PhD.

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

Are tennis balls a disaster for the planet?

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

US Open tennis balls serving up controversy, and players injuries

Perception vs. Reality Madam Sherry's Moorish - Biscayne Times

Tennis ball issue: Sport has a recycling problem – WNA

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

Why Should We Recycle Tennis Balls? Are they Bad For Earth?