How Artificial Nighttime Lighting Is Affecting Our Skies, Wildlife, Environment, and Health. As many homeowners, you are taking steps to reduce your carbon footprint at home. You dutifully recycle glass, metal, paper, and plastic waste each week. You replace all the incandescent light bulbs in your home with energy-efficient compact fluorescent lamps (CFL) or light-emitting diode (LED) bulbs. However, you may be unwittingly contributing to carbon emissions and interfering with delicate ecosystems through light pollution.

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