Task: Text Categorization
Input (English): Population inversion is achieved in diatomic nitrogen and in this molecule in order to produce infrared light in the most commonly used form of laser industrially. In the body, a certain ""anhydrase"" enzyme converts this molecule into an anion. The bond angles of this molecule are 180 degrees, thus making it the textbook example of a molecule with linear geometry. At atmospheric pressure, it does not form a liquid, instead undergoing deposition from its normal form into dry ice. For 20 points, identify this greenhouse gas.
Output (English): Science