Light pollution is the presence of artificial lighting in dark conditions ... offices, factories, street lights, and illuminated sports venues. Light pollution not only affects human health, imbalances the ecosystem, but also causes a waste of energy. So there are a few ways to prevent light pollution such as using only the right light and turning off the lights or using a timer when not needed.
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Một số biện pháp
+ Use only the right light
+ Turn off the lights or use a timer when it's not needed.
