Classification
ETF - Fuel cells - general
ESB - Hydrogen energy
5
ETC - Energy conversion
4
TKJ - Traffic
4
TKH - Air flight, space flight
3
UHK - Traffic and environment - incl. automobile exhaust gas
3
CXA - Coal and fossil fuel - chemistry and technology
2
EVP - Energy models, energy system analysis
2
CNU - Electrochemical synthesis, electrochemical engineering
1
CNW - Electrochemical energy production and conversion
1
CXX - Hydrogen production - chemistry and technology
1
ENA - Energy from biomass and waste
1
EUU - Cogeneration
1
EWA - Energy economy
1