Expansion Renewable energies Carbon dioxide 3 Commerce 3 CO 2 emission 2 CO2 emissions 2 Costs 2 Economic and social effects 2 Economic growths 2 Energy conservation 2 Energy management systems 2 Gross domestic products 2 Information and Communication Technologies 2 OECD countries 2 Pooled mean group 2 Renewable electricity 2 Technology usages 2 Trade openness 2 gross domestic product 2 information and communication technology 2 pooled mean group 2 renewable energy 2 trade openness 2 Carbon 1 Carbon pricing 1 Climate change 1 Climate change mitigation 1 Coal 1 Coal energy 1 Coal fired power plant 1