Kelly Beatty shares easy things we can do to reduce light pollution. He tells us how artificial night light can harm humans, birds, and insects. He shares the five principles of good lighting, and explains how addressing light pollution can save money.

Kelly Beatty shares easy things we can do to reduce light pollution. He tells us how artificial night light can harm humans, birds, and insects. He shares the five principles of good lighting, and explains how addressing light pollution can save money.