What Do UV Rays Do?
There was a time when people spent a lot of time under the sun. They played outdoor games such as tennis and basketball in the hot afternoon sun. They went to beaches to get a tan even without the help of powerful sun block lotions. People then never looked at the sun and saw something that could potentially give them diseases. They saw the sun as something that gives life.
But things are now different. The environment has changed. The sun has UV rays that can be harmful to the body. So what are UV rays? UV rays helps in our bodies make Vitamin D. It also helps in curing the body of psoriasis. But UV rays can be harmful too since it can cause sunburn which can lead to skin cancer. That is why people stay aware from long exposure to the sun.