Columbia subject headings:
Arno River Valley (Italy)--Environmental conditions--21st century.
Greenbelts--Italy--Arno River Valley.
Land use, Rural--Italy--Arno River Valley.
Harvard subject headings:
Arno River Valley (Italy)--Environmental conditions--21st century.
Greenbelts--Italy--Arno River Valley.
Land use, Rural--Italy--Arno River Valley.
Princeton subject headings: