The greenhouse effect refers to conditions wherein the short wavelengths of visible light from the sun go through a transparent medium and are soaked up, but the longer wavelengths of the infrared re-radiation from the heated items are unable to pass through that medium. The trapping of the long wavelength radiation results in more heating and a higher resultant temperature. Besides the heating of an automobile by sunlight due to the windshield as well as the namesake example of heating the greenhouse by sunlight passing through sealed, transparent windows, the greenhouse effect continues to be widely used to describe the trapping of excess heat by the rising concentration of carbon dioxide in the atmosphere. The carbon dioxide strongly absorbs infrared and does not allow as much of it to escape into space.