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Sigma KEE - GreenhouseGas
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温室气体
GreenhouseGas is the subclass of substances that, when present in the atmosphere, trap infrared radiation and cause global warming. Greenhouse gases include carbon dioxide, hydrofluorocarbons, methane, nitrous oxide, ozone, and water vapor.
Relationships      
Parents 加油站 An Object has the Attribute of Gas if it has neither a fixed volume nor a fixed shape.
  純物质 The Class of Substances with constant composition. A PureSubstance can be either an element (ElementalSubstance) or a compound of elements (CompoundSubstance). Examples: Table salt (sodium chloride, NaCl), sugar (sucrose, C_{12}H_{22}O_{11}), water (H_2O), iron (Fe), copper (Cu), and oxygen (O_2).


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