Classification
EHA - Renewable energy sources
123
EXA - Energy policy
39
EBA - Energy production, energy technology
16
EVN - Energy supply - future aspects
15
EVA - Energy demand, energy supply - comprehensive works
10
UKE - Environment and energy resources
10
EAD - Energy - comprehensive works
9
UEF - Sustainability
9
ENA - Energy from biomass and waste
8
EWA - Energy economy
8
UKA - Environmental damage and energy production
8
EVP - Energy models, energy system analysis
7
ETA - Energy storage
6
ETC - Energy conversion
5
TED - Electric power - industrial aspect
5
TEJ - Electric devices, mechanical devices, magnets, dielectrics
5
UKB - Environmental effects and energy
5
CNWK - Electric batteries
4
EIA - Solar energy - general
4
EKA - Wind energy
4
FJB - Electric materials
4
UED - Environmental policy
4
UMV - Climatic change
4
ESB - Hydrogen energy
3
LTN - Biotechnology - biodegradation
3
UKH - Environment and power plants, industrial plants
3
AFG - Large scale research institutions (Helmholtz Centres)
2
CNW - Electrochemical energy production and conversion
2
ECA - Energy resources
2
EMA - Hydroelectric, tidal energy
2
ETF - Fuel cells - general
2
EUD - Energy consumption
2
EVB - Energy supply of Germany
2
GWA - Raw material economy, raw material policy
2
LEL - Botany - lower plants
2
LHH - Microbiology - methods
2
TEDD - Electric power transmission
2
THS - Turbines, pumps
2
TKF - Power plants
2
UEN - Environmental economy
2
UMLE - Air pollution by power plants and industrial plants
2
YEA - Environmental law
2
YPB - Economy - general aspects
2
CHXP - Thermochemistry
1
CLJ - Catalyst materials
1
CWE - Chemical engineering, chemical industry - general
1
CXA - Coal and fossil fuel - chemistry and technology
1
CXR - Natural gas and petroleum - chemistry and technology
1
CXRU - Synthetic fuels
1
CXX - Hydrogen production - chemistry and technology
1
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