Shade ball
Plastic balls used in reservoirs for environmental protection and evaporation reduction
Shade ball
A shade ball is a small plastic sphere floated on top of a reservoir for environmental reasons, including to slow evaporation and prevent sunlight from causing reactions among chemical compounds present in the water. Also known as bird balls, they were developed initially to prevent birds from landing in bodies of water.
Read on Wikipedia · Image Harald Bischoff, CC BY-SA 3.0
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