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'''Greenhouse gas emissions''' ('''GHG''') – refer to gases polluting the environment, such as CO2 CO_2 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>. Electricity and Heat Production (25% of 2010 global greenhouse gas emissions): The burning of coal, natural gas, and oil for electricity and heat is the largest single source of global greenhouse gas emissions.Industry (21% of 2010 global greenhouse gas emissions): Greenhouse gas emissions from industry primarily involve [[fossil fuels]] burned on site at facilities for energy. This sector also includes emissions from chemical, metallurgical, and mineral transformation processes not associated with energy consumption and emissions from waste management activities <ref name="GHG1">Global Greenhouse Gas Emissions Data, [https://www.epa.gov/ghgemissions/global-greenhouse-gas-emissions-data]</ref>.  ==Links for further research==<references />