Subject Region
United States
10
New York
4
New York (State)
4
Ontario
3
World Trade Center Site (New York, N.Y.)
3
Afghanistan
2
Australia
2
China
2
Sarnia
2
Tasmania
2
Androscoggin River Region (N.H. and Me.)
1
Butler County
1
Canada
1
Colombia
1
Colorado
1
Europe
1
Garfield County
1
Iowa
1
Maine
1
Marcellus Shale
1
Mexico (Me. : Town)
1
Mexico (Town)
1
Mexico, Gulf of
1
Middle East
1
Northern Hemisphere
1
Oxford County
1
Rocky Mountains
1
Rumford (Me.)
1
San Juan Basin (N.M. and Colo.)
1