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The ozone layer is a layer in Earth's atmosphere which absorbs most of the Sun's UV radiation. It contains relatively high concentrations ofozone (O3), although it is still very small with regard to ordinary oxygen, and is less than ten parts per million, the average ozone concentration in Earth's atmosphere being only about 0.6 parts per million. The ozone layer is mainly found in the lower portion of the stratosphere from approximately 20 to 30 kilometres (12 to 19 mi) above Earth, though the thickness varies seasonally and geographically.

The Ozone Layer acts as a shield for us from very harmful UV rays. If we damage the Ozone Layer any more than we would put ourselves at an increasingly greater risk. Without the Ozone Layer we wouldn't be able to survive. Exposure to UV rays causes skin cancer, damages crops, and harms ocean life. Without the Ozone Layer the risk of these things would greatly increase. An example of this is in Australia, where a large amount of ozone has depleted. Around 97% of the citizens have or have had skin cancer problems due to the exposure to harmful UV rays that leak through the Ozone layer. Another risk is polar shifting, a complex event that occurs when uneven melting of ice shelfs occur. A major hole is now over Antarctica, where there are ice shelfs. If these Ice shelfs melt, it could increase coastal flooding and the poles could shift, causing a violent shift in climate.

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