A number of factors can lead companies to close stores. One is mergers and acquisitions activity. As organizations join forces under a single umbrella, locations that once competed for sales can become redundant, leading to store closings.
There are 3 types of ultraviolet (UV) rays: 1  Ultraviolet A rays (UVA) make up most of the sun's natural light. They can penetrate deep into the skin, causing wrinkles and premature aging of the skin.  Ultraviolet B rays (UVB) are the main cause of sunburn. They are nearly 1,000 times stronger than UVA rays.
Ultraviolet radiation can burn off skin and cause skin cancer. by Leland Feit Report definition Ultraviolet radiation comprises of three kinds of rays -- ultraviolet A, ultraviolet B, and ultraviolet C. Although ultraviolet C is considered the most dangerous form of ultraviolet light with regards to its possible to damage life on the planet, it cannot penetrate planet's defensive ozone layer.