Why do, especially, "highly-educated" people believe the concentration of carbon dioxide in the atmosphere causes heating? Have they never heard of dry ice?

https://www.quora.com/Why-do-especially-highly-educated-people-believe-the-concentration-of-carbon-dioxide-in-the-atmosphere-causes-heating-Have-they-never-heard-of-dry-ice

https://www.quora.com/Why-do-especially-highly-educated-people-believe-the-concentration-of-carbon-dioxide-in-the-atmosphere-causes-heating-Have-they-never-heard-of-dry-ice/answer/TL-Winslow