What are the main reasons of ozone depletion?

Answer 1

Nature is always doing something different.

The primary "hole" in our ozone layer is actually a naturally occurring thinning of the ozone layer over Antaricia at the end of the long dark winter. Ozone naturally depletes in our atmosphere and we need the sun and oxygen to react and replenish the ozone. If we compressed the upper level ozone into one layer we would see a total thickness of around 3mm in the summer months. At the return of the su.n to the Anarti, this would have reduced down to as little as 1mm of thickness. Fortunately, this layer replenishes very quickly when the sun returns. The primary cause of this reduction is lack of sunlight. Another factor why this hole is so much larger then the much smaller Artic hole is becUse there is more water vapor reaching the upper atmosphere. The largest changes to the overall amount of ozone in our atmosphere is solar activity. Solar flares reaching our atmosphere are believed to have caused the single largest reduction in ozone way back in September of 1859. Man is also a contributor to the issue. Some chemicals, such as CFCs have been noted in trace amounts to have some affect on the overall levels of ozone. The sun reacting with oxygen though will always create ozone and as long as we have these to elements, we will have ozone in the atmosphere.

See "What is causing the depletion of the ozone layer" in the "Related questions" section below.

Answer 2

The major cause of ozone depletion is the use of ozone depleting substances by humans. These contain CFCs which are compounds initiating the decomposition of ozone to deplete it.

Answer 3

The major cause of ozone depletion is the continues use of ozone depleting substances by human beings. These are chemicals which react with ozone to deplete it.

Answer 4

The main reason of ozone depletion is CFC's. they react with ozone and deplete it.