Light pollution is something that does not cross the mind of most Americans because not many people know what king of negative affects it is having on us as humans and most of all, animals and reptiles.  Light pollution is very quickly becoming out of control due to the rapid growth of the worlds population.  Out of all of the species in the world, there were two that were talked about being affected in The City Dark.  

The first species that was talked about was the sea turtles, and how they use the moonlight to find there was to the ocean after being born on the beach.  The filmaker of the movie had something to say about the sea turtles, "Every summer, tens of thousands of [Florida sea] turtles, already a threatened, are lost due to disorientation."  What his is saying is that each year thousands of sea turtles are hatched on the beach, and typically they use the reflection of moonlight off of the water to find there way to the ocean. What ends up happening is because there is so much city light that is around the are of the beach, the sea turtles basically get confused and may start going towards the city light instead of the ocean.  The problem with this is that the baby sea turtles will die of dehydration in a matter of minutes.  The most important problem with this is the fact that the sea turtles are already lacking in population, which is such a sad thing.

The second set of species that is talked about in the movie is the birds that are migrating threw Chicago, and in some cases some of the birds are just flying and not in route to warmer weather.  Chicago is not the only major city that is causing these migratory birds to collide with buildings, it is happening all over the United States.  Ornithologist, Susan Elbin from the Audubon Society says, "The estimate is that there are a billion birds killed across the United States every year by collisions into buildings."  This is terrible in many ways, on one note there are tons of birds crashing into windows and buildings in heavily populated areas, which can obviously be unsanitary.  Also, not that these migratory birds are under populated but there are being billions killed and not do to the cycle of life, but to overpopulating humans leaving lights on all night all over the world.

Besides the reptiles and animals being killed due to the pollution of light, some people also believe that is is ruining natural habitat too.  In The City Dark, Chad Moore, of the National Parks Service says, "When we add light to the environment that has the potential to disrupt habitat, just like running a bulldozer over the landscape..." Basically what he is saying, is the light pollution can cause what is normally a very dark and peaceful wooded area at night to become lit up and mess up the cycle for many species.  When is comes down to it, the amount of light pollution in the world today is growing night by night and something needs to be done about it because it is causing harm to many species around the world.