His blog challenges mainstream climate science by asserting that Earth’s atmosphere is too thin to significantly warm the planet, instead emphasizing that faster rotation allows more solar energy to be absorbed as heat, a claim that contradicts the conventional Stefan-Boltzmann law application to planetary temperatures.

• Christos Vournas argues that Earth's atmosphere is too thin to cause significant greenhouse warming, a view that contradicts mainstream climate science, which attributes global temperature rise to increased CO2 trapping infrared radiation, as evidenced by NASA data showing CO2 levels rising since the Industrial Revolution.
• Vournas claims faster planetary rotation increases solar energy absorption as heat, challenging the Stefan-Boltzmann law's application in climate models; however, peer-reviewed studies (e.g., Journal of Climate, 2019) affirm the law's role in stabilizing climate sensitivity, showing colder regions warm more due to its nonlinearity.
• His Earth-Mars comparison, suggesting similar surface warming mechanisms, overlooks key differences: Mars’ thin atmosphere (0.6 kPa vs. Earth’s 101 kPa) lacks Earth's greenhouse effect, which NASA attributes to human-driven gas emissions warming the planet at an unprecedented rate.