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02 Petroleum
1
020900 -- Petroleum-- Environmental Aspects
1
54 Environmental Sciences
1
540210 -- Environment
Alaska
1
Aquatic Ecosystems
1
Aquatic-- Basic Studies-- (1990-)
1
Arctic Ocean
1
Arctic Regions
Beaufort Sea
1
Carbon 13
1
Carbon Isotopes
1
Coastal Regions
1
Cryosphere
1
Developed Countries
1
Ecosystems
1
Energy Budgets
1
Energy Sources
1
Even-Odd Nuclei
1
Food Chains
1
Fossil Fuels
1
Fuels
1
Isotope Applications
1
Isotope Ratio
1
Isotopes
1
Light Nuclei
1
Matter
1
North America
1
Nuclei
1
Organic Matter
1
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