Columbia subject headings:
Environmental sciences--Early works to 1800.
Human ecology--Philosophy--Early works to 1800.
Harvard subject headings:
Environmental degradation in literature--History--To 1500--Congresses.
Environmental degradation--History--To 1500--Congresses.
Environmental protection in literature--History--To 1500--Congresses.
Environmental protection--History--To 1500--Congresses.
History, Ancient--Congresses
Pollution--History--To 1500--Congresses.
Princeton subject headings:
Environmental sciences--Early works to 1800.
Human ecology--Philosophy--Early works to 1800.