Since this is in the Japan in WW2 Category, the simplest answer would be, it got hit by a Nuclear Bomb. If you like reading books about these sort of things, there is a Manga [Japanese Comic] Series called Barefoot Gen, it is based on a true story as the Author was in Hiroshima at the time of the bombing. Hiroshima was one of two cities in Japan to be hit with an Atomic bomb during World War 2. This was one of the final acts by the United States as Japan withdrew from the war shortly thereafter.
Where is ozone found in the atmosphere? Ozone is mainly found in two regions of the Earth's atmosphere. Most ozone (about 90%) resides in a layer that begins between 6 and 10 miles (10 and 17 kilometers) above the Earth's surface and extends up to about 30 miles (50 kilometers).This region of the atmosphere is called the stratosphere.The ozone in this region is commonly known as the ozone layer. The remaining ozone is in the lower region of the atmosphere, which is commonly called the troposphere. The figure (above) shows an example of how ozone is distributed in the atmosphere.his region of the atmosphere is called the stratosphere. The ozone in this region is commonly known as the ozone layer. The remaining ozone is in the lower region of the atmosphere, which is commonly called the troposphere. The figure (above) shows an example of how ozone is distributed in the atmosphere.
These ozone molecules form a gaseous layer in the Earthâs upper atmosphere called stratosphere. This lower region of stratosphere containing relatively higher concentration of ozone is called Ozonosphere. The ozonosphere is found 15-35 km (9 to 22 miles) above the surface of the earth.