the ozone hole

An expert of World Meteorological Organization (WMO) reported that the ozone hole above the South Pole have become bigger. It covered 2900 square kilometers at its worst in 2000, and now the hole is approaching the record. There are so many problems in the world and we sometimes forget global warming. However it is a very serious problem that influence our future lives. We destroy our lives and precious things ourselves. We need to think about and move on it more.