How is the ozone layer reforming?

Ozone layer works by ultraviolet light breaking apart oxygen molecules and then reforming them as ozone. Ozone converts the dangerous ultraviolet rays into harmless heat. With an adequate supply of ozone and oxygen, the ozone layer will absorb approximately 98 percent of incoming ultraviolet rays. read more

Ozone layer damage is more like a really thin patch than a hole. The ozone layer is thinnest near the poles. In the 1970s, people all over the world started realizing that the ozone layer was getting thinner and that this was a bad thing. read more

Most of the ozone production occurs in the tropical upper stratosphere and mesosphere. The total mass of ozone produced per day over the globe is about 400 million metric tons. The global mass of ozone is relatively constant at about 3 billion metric tons, meaning the Sun produces about 12% of the ozone layer each day. read more