Columbia subject headings:
Conservation of natural resources--Costa Rica--Congresses.
Deforestation--Control--Costa Rica--Congresses.
Environmental protection--Costa Rica--Congresses.
Forest management--Costa Rica--Congresses.
Harvard subject headings:
Princeton subject headings:
Environmental policy--Costa Rica--Congresses.
Environmental protection--Costa Rica--Congresses.
Human ecology--Costa Rica--Congresses.
Nature--Effect of human beings on--Costa Rica--Congresses.
Pollution--Environmental aspects--Costa Rica--Congresses.