- Energy industries--Taxation--Organisation for economic Co-operation and Development countries (1)
- Energy policy--Environmental aspects (1)
- Energy policy--Finance--Congresses (1)
- Energy policy--Hungary (1)
- Energy policy--Poland (1)
- Energy policy--Poland--Congresses (1)
- Environmental policy (1)
- Financial institutions - Investments--Congresses (1)
- Flue gases--Putification (1)
- Gas Industry--Forecasting (1)
- Gas industry (1)
- Gas industry--Government policy (1)
- Gas, Natural (1)
- Global warming--Prevention--International cooperation--Periodicals (1)
- Greenhouse effect, Atomospheric--Congresses (1)
- Greenhouse gases--Environmental aspects (1)
- Greenhouse gases--Environmental aspects--Congresses (1)
- Greenhouse gases--Government policy--OECD countries--Periodicals (1)
- Greenhouse--gases--Congresses (1)
- Heat pumps (1)
- Heating from central stations (1)
- Household appliances, Electric--Energy consumption (1)
- Industries--Energy consumption (1)
- Industry--Energy consumption (1)
- Internal combustion engines, Spark ignition--Alternate fuels (1)
- Microprocessors (1)
- Monopolies (1)
- Motor vehicles--Fuel systems (1)
- Natural gas reserves (1)
- Natural gas--Transportation (1)
- Nitrogen oxides--Environmental aspects (1)
- Organisation for economic co-operation and Development (1)
- Petroleum industry and trade --Developing countries (1)
- Petroleum industry and trade--Congresses (1)
- Petroleum industry and trade--Forecasting (1)
- Photovoltaic power generation--Cost effectiveness--Congresses (1)
- Power (Mechanics) (1)
- Power resorces--Poland--Congresses (1)
- Power resources--Congresses (1)
- Power resources--Economic aspects (1)
- Power resources--Forecasting (1)
- Privatization--Case studies (1)
- Renewable energy sources (1)
- Renewable energy sources--Research--Economic aspects (1)
- Solar energy industries--Congresses (1)
- Sulphur dioxide--Environmental aspects (1)
- Supply and demand (1)
- Synthetic fuels--Congresses (1)
- Transportation--Energy conservation (1)
- competition (1)
- エネルギー政策 (1)
- ガス--統計 (1)
- 工業動力.エネルギー (1)
- 石油--統計 (1)
- no value (89)