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Light pollution is the human-made alteration of outdoor light levels from those ocurring naturally. It has harmful effects on:

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By Staff
•International Dark Sky Week draws attention to the problems associated with light pollution and promotes simple solutions available to mitigate it.
Whether you’ll be marching for science, attending a star party, checking out one of IDA’s International Dark Sky Places, or just want to help spread the word about light pollution during the 2017 International Dark Sky Week, you can do it in style all while supporting IDA!
Our 2017 designs are available for purchase, and if you order now, your purchase will not only be help IDA financially, you’ll also have your order in time help spread awareness of the issues of light pollution during International Dark Sky Week, April 22-28, 2017.
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| IDA 2017 Men’s T-Shirt $24.95 | IDA 2017 Women’s T-Shirt $24.95 | IDA 2017 Tote Bag $14.95 |
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Each year, DarkSky International updates the latest results from scientific studies of ALAN


