Hierarchy classification:

1. top of the aat hierarchies
2. Associated Concepts Facet
3. Associated Concepts (hierarchy name)
4. environmental concepts

Anotations

Scope note:

Gases that contribute to the greenhouse effect, including water vapor, carbon dioxide (CO2), methane (CH4), ozone (O3), nitrous oxide (N2O), hydrofluorocarbons (HFCs), halogenated fluorocarbons (HCFCs), and perfluorinated carbons (PFCs).