Kelsey Johnson : The problem of light pollution — and 5 ridiculously easy ways to fix it

Kelsey Johnson·TED@NAS
The problem of light pollution — and 5 ridiculously easy ways to fix it
Summary
In December, people are excited about coming Christmas and in the cities, illuminations are really beautiful. However, always lightening cities is light pollution that I don’t know.

The speaker is an astronomer thus she could see real satellite pictures from space that are very beautiful illuminations, though, she tells us that at night, we can't see a truly dark night sky which is a big problem. It'll break a biological clock for not only us but also animals and plants. It's relating to our diseases, for example, cancer and so on, and small creatures are eaten because of brighter light, they are caught. The ecosystem will be breaking. Illuminations cost is high and it uses much energy.

It will be better for us to have to do something that is even small.
The speaker suggests 5 ridiculously easy ways to fix it. It's funny because it seems to be ridiculous.

Don't use lights brighter than you need to. 1) Don't use lights when you don't need them. 2) Those lights you're using, make sure they're shielded down, so they're not shining up into the sky. 3) Use LED lights. If you have a choice, don't buy the blue ones. 4)  Advocate for this. 5)

Today, we know that in our world, there is a problem of light pollution and there are 5 things that we can do to fix it.