However, while UVB rays are responsible for the health benefits of sunshine, tanning salons are most concerned with the UVA rays. The reason for this is that overexposure to UVB rays, which affect the surface layers of skin, quickly causes the skin to burn.
This article is about the war that started in 2003 and ended in 2011. For the initial invasion, see 2003 invasion of Iraq. For the ongoing war in Iraq, see Iraqi Civil War (2014âpresent). For previous wars in Iraq, see Iraq War (disambiguation).
World War I (WWI) was a global war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918. It was predominantly called the World War or the Great War from its occurrence until the start of World War II in 1939, and the First World War or World War I thereafter.