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'''Greenhouse gas emissions''' ('''GHG''') refer to gases polluting the environment, such as CO_2 CO2 and methane. Around 10% of the GHG emitted worldwide in 2012 came from the EU. However, in 2014, greenhouse gas emissions in the EU-28 were down by 22.9 % compared with 1990 levels, representing a significant reduction, putting the EU on track to surpass its [[2020 climate and energy package]] targets, which is to reduce GHG emissions by 20 % by 2020 and by 40 % by 2030 compared with 1990 <ref name="GHG2">Eurostat:Greenhouse gas emission statistics
, [http://ec.europa.eu/eurostat/statistics-explained/index.php/Greenhouse_gas_emission_statistics]</ref>. Moreover, a surge in the use of [[Renewable energy sources (RES)]] helped Europe to cut its [[fossil fuels]] consumption and greenhouse gas emissions by about 10% in 2015 <ref name="GHG3">European Environment Agency: Renewable energy in Europe 2017: recent growth and knock-on effects
, [https://www.eea.europa.eu/publications/renewable-energy-in-europe-2017]</ref>.
