WHAT EFFECTS LIGHT POLLUTION HAS?

Below is an excerpt from a student's paper.

Many people think lights don't have a bad effect except the waste of energy at times and over heating. It has a bad effect on women with increasing risk of breast cancer. In countries that are industrialized they haven greaten the risk of breast cancer for women. Cancer cells are out in the daytime during the hours of the sun they show up with light. Well the street lights and all the house lights keep the around and awake. The night time is when they to back to being dormant.

I have no idea what he's talking about.

I can't believe this person was allowed to graduate from high school.