Summary: The creation of the light bulb in 1879 would forever shape our homes, streets and offices. But by the 1950s, light pollution became a concern, as it effects both natural ecosystems and human health. In fact, studies have shown that light pollution can be linked to breast cancer. Today, the future of Arizona's dark sky could be threatened by light pollution. It's an issue dark sky advocates are working to ease. This week's episode of Valley 101, a podcast from The Arizona Republic and azcentral.com, breaks down what the Valley is doing to mitigate light pollution. In this episode, you'll hear: The components that make up light pollution. The impacts of light pollution on the state's tourism and economy. The steps communities in Metro Phoenix are making to combat light pollution. Learn more about your ad choices. Visit megaphone.fm/adchoices
