Columbia subject headings:
Atmospheric carbon dioxide--Environmental aspects--Congresses.
Carbon dioxide--Congresses.
Carbon dioxide--Environmental aspects--Congresses.
Flue gases--Purification--Congresses.
Harvard subject headings:
Atmospheric carbon dioxide--Environmental aspects--Congresses.
Carbon dioxide--Congresses.
Carbon dioxide--Environmental aspects--Congresses.
Flue gases--Purification--Congresses.
Princeton subject headings:
Carbon dioxide--Environmental aspects--Congresses.
Catalysis--Congresses.