In light of this concern, let us now consider the possibility that, due to human activity, we may over the next century experience global warming at rates and magnitudes unparalleled in recent geologic history. Climate change and ozone depletion are the same thing. Although global warming and ozone depletion are interrelated atmospheric phenomena they are not the same thing. Changes of ozone concentrations in the atmosphere can significantly affect the climate system. However, the primary cause of climate change is the increase in atmospheric concentrations of carbon dioxide, methane, nitrous oxide, and other greenhouse gases.
Ozone depletion causes global warming.
While the two phenomena are related, there is no simple cause and effect linkage. The increasingly warm weather of recent years is not without precedent in the world s climate history. Canada s present climate was established about 10,000 years ago when the last great ice age ended. However, Canada has experienced several smaller-scale climate changes since then. For example, around 5,000 years ago the northern Arctic region was 3 C warmer than today.