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54 ENVIRONMENTAL SCIENCES
3
Alert, NWT, Canada
3
Cape Ferguson, Australia
3
Cape Grim, Australia
3
Macquarie Island, Australia
3
Mawson, Antarctica
3
Shetland Islands, Scotland
3
South Pole, Antarctica
3
Estevan Point, BC, Canada
2
Mauna Loa, Hawaii
2
Casey, Antarctica
1
Estevan Point, BC. Canada
1
Mauna Loa, Hawaii, USA
1
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