How many total holes are there in stratosphere (ozone layer)?

Startosphere or the ozone layer is not a constant fixed one, the height and extent of these layers change from time to time. Ozone hole also changes in a similar way. read more

The purple and blue colors are where there is the least ozone, and the yellows and reds are where there is more ozone. 2017 Season The graphs above show the progress of the ozone hole for 2017. read more

The Antarctic ozone hole is an area of the Antarctic stratosphere in which the recent ozone levels have dropped to as low as 33 percent of their pre-1975 values. The ozone hole occurs during the Antarctic spring, from September to early December, as strong westerly winds start to circulate around the continent and create an atmospheric container. read more