fossil fuels 5 [vynechat] fosílne palivá 5 [vynechat] alternative energy sources 2 [vynechat] alternatívne energetické zdroje 2 [vynechat] climate changes 2 [vynechat] klimatické zmeny 2 [vynechat] climate protection 1 [vynechat] coal 1 [vynechat] economic aspects 1 [vynechat] ekonomické aspekty 1 [vynechat] energetická politika 1 [vynechat] energetické zdroje 1 [vynechat] energia 1 [vynechat] energy 1 [vynechat] energy policy 1 [vynechat] environment 1 [vynechat] environmental aspects 1 [vynechat] environmental policy 1 [vynechat] environmental problems 1 [vynechat] environmentálna politika 1 [vynechat] environmentálne aspekty 1 [vynechat] environmentálne problémy 1 [vynechat] facts and features 1 [vynechat] global environmental change 1 [vynechat] global problems 1 [vynechat] global warming 1 [vynechat] globalization 1 [vynechat] globalizácia 1 [vynechat] globálne otepľovanie 1 [vynechat] globálne problémy 1 [vynechat]