Offshore oil industry -- European Union countries Offshore gas industry -- European Union countries Energy development -- European Union countries

Cities and towns -- Energy conservation -- European Union countries Energy conservation -- Technological innovations -- European Union countries Urban ecology (Sociology) -- European Union countries Cities and towns -- Effect of technological innovations on -- European Union countries Quality of life -- European Union countries

Energy conservation -- European Union countries -- International cooperation Energy policy -- European Union countries -- International cooperation

OPET Network (European Commission) Energy industries -- Technological innovations -- European Union countries Energy development -- European Union countries Renewable energy sources -- Research -- European Union countries

Petroleum industry and trade -- Environmental aspects -- European Union countries Hydrocarbons -- Research -- European Union countries Energy development -- European Union countries