# Remember those black balls floated on a reservoir?

**URL:** <https://boards.straightdope.com/t/remember-those-black-balls-floated-on-a-reservoir/735782>\
**Category:** In My Humble Opinion\
**Created:** [October 26, 2015, 10:09am UTC](https://boards.straightdope.com/t/remember-those-black-balls-floated-on-a-reservoir/735782 "2015-10-26T10:09:02Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Quartz](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/quartz/32/267_2.png) [@Quartz](https://boards.straightdope.com/u/Quartz)\
**Post date:** [October 26, 2015, 10:09am UTC](https://boards.straightdope.com/t/remember-those-black-balls-floated-on-a-reservoir/735782/1 "2015-10-26T10:09:02Z")

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To cut evaporation?

Here’s a much more sensible solution: float [solar panels](http://www.telegraph.co.uk/finance/newsbysector/energy/11954334/United-Utilities-floats-3.5m-of-solar-panels-on-reservoir.html) instead.

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**Author:** ![kanicbird](https://avatars.discourse-cdn.com/v4/letter/k/5f8ce5/32.png) [@kanicbird](https://boards.straightdope.com/u/kanicbird)\
**Post date:** [October 26, 2015, 12:18pm UTC](https://boards.straightdope.com/t/remember-those-black-balls-floated-on-a-reservoir/735782/2 "2015-10-26T12:18:12Z")

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Waiting to see what ever happen to those black balls as they break down. Hopefully they were BPA free

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**Author:** ![swampspruce](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/swampspruce/32/261_2.png) [@swampspruce](https://boards.straightdope.com/u/swampspruce)\
**Post date:** [October 27, 2015, 3:10pm UTC](https://boards.straightdope.com/t/remember-those-black-balls-floated-on-a-reservoir/735782/3 "2015-10-27T15:10:50Z")

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Solar Floatways? 🙂