Light pollution

No, not "light" pollution, as opposed to "heavy" pollution.

Yes, the pollution caused by light....

The most vocal opponents of light pollution are astronomers, as their ability to see stars is affected. For example, the Sheshan branch of the Shanghai Astronomical Observatory was built on Sheshan Mountain about 38 km from Shanghai, as it was considered an ideal place for observations. However, the growth of Shanghai has meant that, in spite of the best instruments money can buy, Sheshan is no longer suitable for astronomical observations of the level needed, and so the equipment for the observatory is being shifted to another city in another province. The good thing is that China has made this area, Tianhuangping, Anji City, into a "night sky protected area".

Great idea. I hope other countries follow the example of China.

So why is this post on this blog, which is supposed to be about medical matters?

Because it turns out that light pollution isn't just bad for astronomical observations, it is also bad for our health!

According to Professor Dr You Jianxin, Deputy President of the Chinese Academy of Science and Technology Management Program at Tongji University in Shanghai, excessive light can cause an increase in headaches, stress, anxiety, eye disease and even a decrease in sexual function.

What I would like to ask Professor You is whether the research related to all kinds of light (natural as well as artificial) or only to one kind of light?

In other words, are the problems caused only by artificial light?