How Climate Change Isn’t Just Another Natural Cycle
Posted on November 20, 2009
Filed Under Climate Change | Leave a Comment
There are still some nay-sayers who would claim that the warnings over climate change are just hot air. Though an overwhelming majority of North Americans are in favour of making changes to avert a climate change disaster, a vocal minority postulates that the observed changes since the industrial revolution are part of a natural cycle of periodic climate change.
It’s true, that the climate has gone through many tumultuous changes in 4 billion years. Ice sample cores that can be tapped to track the composition of the atmosphere, go back at least 800,000 years and give a portrait of carbon dioxide concentrations that have fluctuated on several additive cycles, with great changes during the ice ages. No one is still quite sure what causes an ice age to happen, but it was during this research in the 19th century that the relationship between carbon dioxide and the ability of the climate to trap solar heat was discovered.The levels of carbon in the atmosphere today are well outside the “norm” experienced since the existence of human beings.
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