Tennis Looks for Solutions to Tennis Ball Waste
The sport of tennis has a problem with waste. Tennis balls are not recyclable. Almost all of the 330 million balls manufactured each year end up in waste, or garbage, landfills. Once there, it can take as long as 400 years for the balls to decompose.
Source : https://learningenglish.voanews.com/a/tennis-looks-for-solutions-to-tennis-ball-waste/7257172.html