greenhouse effect
-

How Exactly Does Carbon Dioxide Cause Global Warming?
CO2 molecules make up only a small percentage of the atmosphere, but their impact on our climate is huge. The reason comes down to physics and chemistry.
-

You Asked: If CO2 Is Only 0.04% of the Atmosphere, How Does it Drive Global Warming?
Short answer: A little bit goes a long way.

You Asked invites you to share your most pressing questions about climate, science, and sustainability. Lamont-Doherty Earth Observatory and Columbia Climate School experts will respond with clear, evidence-based answers. Pose your questions and story ideas!
