FBI stats for 2009 show that only 27.9% of crime happens at night. If light prevented crime, why is 72.1% of it happening in the daytime? And they aren't need for navigation as we can use flashlights for that. And cars have their own lights that are better focused for drivers to see than streetlights.The lights are for safety and security as well as safe navigation
Plants are evolved for a normal day/night cycle and do better with both.Yet plants thrive under the additional lighting and most animals are attracted to light. Others use the shadows for shelter from light
No, it has nothing to do with heat generated by a light bulb. It is gasses like carbon dioxide and methane created by such activities as burning coal & natural gas and during the production/refining of fossil fuels. These are easily measurable and are increasing. The problem with these gasses is that they absorb & emit thermal radiation, increasing warming on Earth.And how does one measure what a "greenhouse gas" is? Is this the amount of heat generated by light?
Here are some supporting studies:excessive light has been linked to cancers, obesity, immune system disorders and depression in humans None of these have had any real solid backing, only theory.
1. Disruption of Circadian Rhythms
2. Light Pollution and Cancer
3. Light and Newborn Babies
The American Medical Association supports control of light pollution because of its effects on health.
Not over large cities as there is a light "dome" created. The Hancock building in Chicago used to get 1500 dead birds at its base every night during migrations so they turned off their lights.many migratory birds use stars to navigate at night which light pollution hides If they look upwards, they will see stars, look downward to see lights. It is simple stuff. And, if I, from the ground in a major city, can see the stars, I am sure birds 1000 feet closer to them can see the stars, too.
it keeps us from our dark sky heritage It looks pretty dark in the sky to me.
When you look up from within a city, you are seeing only a few stars. Drive a couple of hours out of town on a dark night with no moon up and you will be amazed at what you see. That is the dark sky heritage we are losing.