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energy conservation
energy policy
5
carbon dioxide production
3
energy demand
3
energy management
3
energy resource
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biomass
2
energy consumption
2
energy planning
2
energy source
2
energy storage
2
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energy transport
2
greenhouse effect
2
reactor safety
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renewable energy source
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1
biomass energy production
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1
energy
1
energy pricing
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environment
1
environmental pollution
1
fusion technology
1
geothermal energy
1
hydroelectric power
1
methanol
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EXA - Energy policy
EVA - Energy demand, energy supply - comprehensive works
2
UKB - Environmental effects and energy
2
YZA - Politics, political science
2
EAD - Energy - comprehensive works
1
ECA - Energy resources
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EUA - Energy conservation - general
1
EUD - Energy consumption
1
EWA - Energy economy
1
UKA - Environmental damage and energy production
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