Problem: Climate change has been dramatic in the past and carbon dioxide levels were nearly 6 times greater during the Cambrian period compared to the present. Is the climate change in the last century out of the ordinary compared to the past 2000, 20 000, or 1 million years? Scientists have also debated the cause (volcanic eruptions, Sun's energy output, natural cycles, greenhouse gases) of the global warming over the last century.
Should we be concerned about the current global warming trends? (Think about current organisms being able to adapt, past climate changes, and causes of this climate change event.)