Columbia subject headings:
Art, Modern--21st century--Congresses.
Art--Political aspects--Congresses.
Ecology in art--Congresses.
Environment (Art)--Congresses.
Harvard subject headings:
Art, Modern--21st century--History and criticism.
Art--Political aspects
Environmental protection in art
Princeton subject headings:
Art, Modern--21st century--Congresses.
Art--Political aspects--Congresses.
Ecology in art--Congresses.
Environment (Art)--Congresses.