When we hear the word "pollution," our minds often go straight to smoke chugging out of power stations or cities gray with smog. We normally think and use the word in the context of air or water. But a lesser-known term is "light pollution," and it refers to the artificial light humans use to flood the Earth. Of course, non-natural lighting has its uses, but recent research shows it also has a harmful effect on plants and animals.
Intrigued? Then click through this gallery to learn all about light pollution and its effect on wildlife.