While most people cannot deny climate change and global warming, there are still some skeptics about the phenomenon and its effects. I found two specific websites that compare the common skeptic myths versus the facts:
I’ll select the top argument against climate change. The myth is that the climate’s changed before. More specifically:
“Climate is always changing. We have had ice ages and warmer periods when alligators were found in Spitzbergen. Ice ages have occurred in a hundred thousand year cycle for the last 700 thousand years, and there have been previous periods that appear to have been warmer than the present despite CO2 levels being lower than they are now. More recently, we have had the medieval warm period and the little ice age” (Richard Lindzen).
This is one of the more popular arguments agains the climate change and its potentially disastrous effects. There have been periods of time with temperature flux, specifically the ice ages and periods of heat. Some people even state that there were warmer periods than right now. In other words, the current temperature ranges are actually a part of the natural cycle of the planet. Some skeptics will confess that the human population has slightly affected the cycle, but overall, it is a natural occurance. The refute is a little simplified and acts as an introduction to a more in depth discussion with graphs and figure. The simplified response is:
“Natural climate change in the past proves that climate is sensitive to an energy imbalance. If the planet accumulates heat, global temperatures will go up. Currently,CO2 is imposing an energy imbalance due to the enhanced greenhouse effect. Pastclimate change actually provides evidence for our climate’s sensitivity to CO2.”
In other words, the past climate changes (the fluctuations in temperature seen in the ice ages and periods of heat) are due to an energy imbalance. The energy imbalance causes the global temperatures to rise or fall. For this rise in temperature, the imbalance is caused by the climate’s sensitivity to CO2. As the CO2 increases, it retains heat inside the atmosphere and creates the greenhouse effect.
So, yes. Temperature change has occurred in the past. And this temperature fluctuation can be affected by levels of CO2….which has dramatically risen. So, the “myth” that global warming is just part of a natural cycle is true. Naturally, an imbalance can affect the climate. However, the “myth” is false in assuming that humans have not affected the Earth. We are actually causing the imbalance. Would it have occurred without us? Yes, only much more slowly.
Check out the websites for the scientific evidence and other interesting debates, such as: It’s the Sun’s fault, It’s actually cooling, it’s not that bad. My personal favorites are the following: the ice glaciers are actually growing, it’s because of Mars, and “it’s too hard” to fight.