Columbia subject headings:
Cuzco (Peru)--Economic conditions.
Cuzco (Peru)--Environmental conditions.
Nature--Effect of human beings on.
Pollution.
Harvard subject headings:
Cuzco (Peru)--Economic conditions.
Cuzco (Peru)--Environmental conditions.
Nature--Effect of human beings on
Pollution
Princeton subject headings:
Cuzco (Peru)--Economic conditions.
Cuzco (Peru)--Environmental conditions.
Nature--Effect of human beings on--Peru--Cusco.
Organic wastes--Recycling--Peru--Cusco.
Pollution--Environmental aspects--Peru--Cusco.