US Stamp Gallery >> Browse stamps through the history of the United States


Search by subject, description,
content or year


Home

About

See All US Stamps

Add stamps to
your own website


Stamps through:
1847-1850
1851-1875
1876-1900
1901-1925
1926-1950
1951-1975
1976-2000
2001-2017

Globe & bluegill
Date Issued: 1970-10-28
Postage Value: 6 cents

Commemorative issue
Anti-pollution
Globe & bluegill

Primary wastewater treatment removes about 60 percent of suspended solids and 35 percent of biodegradable organic material in municipal sewage and in industrial wastewater. Advanced treatment of waste involving biological, chemical, and physical methods of disposal is used either to remove plant nutrients that promote excessive growth of algae in water or to remove industrial pollutants.

Topic: Fish/Fishing (63)  

Back Link to this stamp    Embed this stamp on your website
Browse Stamps through
the history of the United States


African American (234)
Agriculture (58)
Airplane (150)
Animal (517)
Architecture (107)
Art (607)
Author (154)
Automobile (69)
Baseball (43)
Bird (274)
Boxing (4)
Bridge (29)
Butterflies (31)
Canal (8)
Cats (21)
Children (180)
Christmas (213)
Columbus (31)
Culture (45)
Dance (28)
Dogs (59)
Dolls (23)
Eagle (72)
Entertainment (417)
Explorer (11)
Fish/Fishing (63)
Flag (322)
Flower (388)
Football (38)
Forever Stamp (350)
Harry Potter (20)
Hockey (1)
Holocaust (5)
Horse (141)
Industry (11)
Insects (49)
Inventor (37)
Italian Heritage (131)
Landscape (214)
Lighthouses (41)
Lincoln (6)
Lunar New Year (45)
Map (103)
Marine Life (6)
Medicine (52)
Military (454)
Movie Industry (166)
Music (175)
Native American (93)
Olympics (123)
Photography (3)
Politics (153)
Portrait (895)
Postal Service (98)
President (284)
Railroad (70)
Red Cross (5)
Religion (46)
Rural (7)
Science/Scientists (90)
Scouting (13)
Ship (179)
Slavery (3)
Soccer (10)
Space (144)
Sport (264)
Stamps on Stamps (24)
Statue of Liberty (26)
Tennis (2)
Trains (1)
Urban (27)
Valentine (4)
Wedding (20)
Wild West (3)
Windmill (7)
Woman (572)
WWII (84)