In Michael Crichton's book "State of Fear," he addresses the rise in atmospheric carbon dioxide levels, attributing this increase primarily to human actions. The implications of rising CO2 levels are critical in understanding the ongoing debates around climate change and its potential impacts on the environment.

Crichton emphasizes the significance of recognizing human influence on climate change while also encouraging a critical examination of the narratives surrounding it. His work highlights the need to balance environmental concerns with a rational evaluation of the data and methodologies used in climate science.