City of Lights: Paris was one of the first major cities in Europe to use gas streetlights. By the early 1820s, over 50,000 gas lamps illuminated its streets, making it safer and more vibrant at night.

Monuments and luxury shopping districts across Paris are shutting off the lights early. The government—a major energy consumer in France—has asked municipalities, households and companies to reduce ...

It’s not just about seeing the stars. Bright city lights disorient animals like birds, leading to fatal collisions and potential long-term damage to their health. The city lights of La Paz, Bolivia ...