Within the Thermal Infrared range some gases absorbs and emits radiation. They are known as Green House Gases. Example of Green House Gases are : Nitrous Oxide, Carbon Dioxide, methane & Ozone.
But there are various gases in atmosphere which are Non Green House Gases. For example Nitrogen, Oxygen & Argon are Non Green House gases. Due to their molecular structure they do not posses the properties of Green House Gases.