Columbia subject headings:
Harvard subject headings:
Climatic changes
Climatic changes--Social aspects
Climatic extremes--Social aspects.
Climatology--Social aspects.
Droughts.
El Niño Current.
Environmental impact analysis--Social aspects.
Southern oscillation.
Princeton subject headings:
Climatic changes--Social aspects.
Climatic changes.
Droughts.
El Niño Current.
Southern oscillation.