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by kevinbowman
1462 days ago
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“Shade balls”, there are 96M of them in (on?) a big Los Angeles reservoir : https://en.wikipedia.org/wiki/Shade_balls They are made from HDPE, with an additive to prevent UV-accelerated breakdown into bromates (which is what they are there to stop forming in the water, as well as to stop evaporation). |
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