Columbia subject headings:
Electric power-plants--Environmental aspects--Congresses.
Electric power-plants--Environmental aspects--United States--Congresses.
Harvard subject headings:
Electric power-plants--Environmental aspects--Congresses.
Electric power-plants--Environmental aspects--United States--Congresses.
Princeton subject headings:
Electric power-plants--Environmental aspects--Congresses.
Electric power-plants--Environmental aspects--United States--Congresses.