Earth has been both cooler and warmer in the past, but the change is usually gradual. The current rate of carbon dioxide increase is unprecedented in human history, and solutions to mitigate its effect on global warming are challenging to implement.
Dr. Schrag discusses climate change in the geologic past and explains how that knowledge can help us understand the impact of human activities on future climate. Climate researchers agree that over the past century human activities have been causing global temperatures to rise at unprecedented rates. Dr. Schrag looks at how this trend might be slowed with the aid of technologies such as carbon capture and storage.