Columbia subject headings:
Environmental engineering--Periodicals.
Environmental health--Periodicals.
Environmental protection--Periodicals.
Nature--Effect of human beings on--Periodicals.
Pollution--Periodicals.
Harvard subject headings:
Environmental engineering--Periodicals
Environmental health--Periodicals
Environmental protection--Periodicals
Nature--Effect of human beings on--Periodicals
Pollution--Periodicals
Princeton subject headings:
Environmental engineering--Periodicals.
Environmental health--Periodicals.
Environmental protection--Periodicals.
Nature--Effect of human beings on--Periodicals.
Periodicals.
Pollution--Periodicals.