There are a lot of factors and suspected factors contributing to climate change, and a thinning of the ozone layer is only one possible reason. The ozone layer does absorb (according to NASA) 97-99% of the ultraviolet light from the sun. If more ultraviolet light reached the surface of the earth it could negatively impact life, but we don’t really know what would happen were the ozone layer to thin drastically.
As sfincher stated, the ozone layer is one possible reason for global warming. More likely, the increase in output of greenhouse gases is what contributes most to the rapid warming of the Earth.
If we do not cut back significantly on our greenhouse gas emissions, the surface temperature of the Earth with continue to rise.
Previously noted by sFincher and Krich11, climate change may be the result of several factors. There is a common scientific belief that the cause of the increase in climate is a result of CO2 emissions. Although the thinning of the ozone layer should not be completely ruled out, it does not seem to be a leading cause of global warming. However, the depletion of the ozone layer does have its own consequences and has caused “a large increase in Ultra Violet Radiation reaching the surface of the earth”.
The decline of the ozone layer is harmful in many ways, but as everyone else has noted, increased surface-level temperatures is not the primary concern. In the troposphere – where we live – the thin ozone creates adverse health impacts attributed to higher exposure to UV rays and higher amounts of chemicals in the air. Overall, a dangerous drop in air quality is the main issue that impacts humans, rather than hotter climates.
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