Ecological impact of tennis balls is out of bounds, environmentalists say - CBS News
Por un escritor de hombre misterioso
Nearly all 330 million balls made worldwide each year eventually get thrown out, with most ending up in landfills for centuries.
Associated Press Is Clutching Their Pearls Over Tennis Balls
New Smog Rules not Just for Big Cities - CBS News
Washington Classroom with Frank Newport
Ecological impact of tennis balls is out of bounds, environmentalists say - CBS News
Green Tennis – Save our environment one ball at a time
How can recycling tennis balls improve climate?
Beware the Critical Points
US Open Using Nearly 100K Tennis Balls Upsets Environmentalists
Ecological impact of tennis balls is out of bounds, environmentalists say - CBS News
A Supreme Court ruling on fishing for herring could sharply curb federal regulatory power