Columbia subject headings:
Environmental policy--Brazil--Congresses.
Environmental protection--Brazil--Congresses.
Pollution--Brazil--Congresses.
Harvard subject headings:
Environmental policy--Brazil--Congresses
Environmental protection--Brazil--Congresses
Pollution--Brazil--Congresses.
Princeton subject headings:
Environmental policy--Brazil--Congresses.
Environmental protection--Brazil--Congresses.
Pollution--Brazil--Congresses.