I want to speak of the enviroment, the problematic of the global warming. I found in a magazine called National Geographic the consequences of the green effect and of using a lots of lights. We could be without artificial lights, just with the moon and the stars, it would be enough for us to see just the necesary. But we are species that what the sunlight. So we invented something that replace it when its gone; Artificial lights. with this we damage all the environment and the earth, so we damage US, our world, the place of our sons. We have to think more in what is good for the earth.
National Geographic