<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">carbon dioxide</topic></authority><related type="narrower"><topic>dry ice</topic></related><related type="narrower"><topic>liquid carbon dioxide</topic></related><related type="broader"><topic>organic material</topic></related><variant type="other"><topic>CO2</topic></variant><variant type="other"><topic>carbonic acid gas</topic></variant><variant type="other"><topic>carbonic anhydride</topic></variant> <note xml:lang="en"><![CDATA[ Colorless gas (CO2) with a sharp odor; it is a minor component in the earth's atmosphere, does not support combustion, dissolves in water to form carbonic acid, is formed in animal respiration and in the decay or combustion of animal and vegetable matter, and is absorbed from the air by plants in photosynthesis. Carbon dioxide is used as a refrigerant and is found in carbonated beverages and fire extinguishers, among other uses. ]]></note></mads>