Columbia subject headings:
Environmental law--United States--Congresses.
Environmental protection--United States--Finance--Congresses.
Licenses--United States--Congresses.
Harvard subject headings:
Environmental permits--United States--Congresses.
Environmental policy--Economic aspects--Congresses
Environmental protection--United States--Finance--Congresses.
Pollution--Congresses
Princeton subject headings:
Environmental law--United States--Congresses.
Environmental protection--United States--Finance--Congresses.
Licenses--United States--Congresses.