Trends in global CO2 emissions: 2013 report

Actual global emissions of carbon dioxide (CO2) reached a new record of 34.5 billion tonnes in 2012. Yet, the increase in global CO2 emissions in that year slowed down to 1.1% (or 1.4%, not accounting the extra day in the leap year), which was less than half the average annual increase of 2.9% over the last decade. This development signals a shift towards less fossil-fuel-intensive activities, more use of renewable energy and increased energy saving.

2012 sees slowdown in the increase in global CO2 emissions

Three countries/regions remain responsible for 55% of total global CO2 emissions. Of these three, China (29% share) increased its CO2 emissions by 3%, which is low compared with annual increases of about 10% over the last decade. Although China's CO2 emissions per capita are comparable to those in the EU and almost half of the US emissions per capita, its CO2 emissions per USD in Gross Domestic Product (GDP) are almost double those in the EU and the United States and similar to those in the Russian Federation. In the United States (16% share) CO2 emissions decreased by 4%, mainly because of a further shift from coal to gas in the power sector. The European Union (11% share) saw its emissions decrease by 1.6%, mainly due to a decrease in energy consumption ( oil and gas) and a decrease in road freight transport.

An accelerated growth in renewable energy

Energy carriers in the primary energy supply all showed continuous increases over the past decade, except for nuclear energy, which decreased since 2012 in the aftermath of the Fukushima accident. Renewable energy has shown an accelerated increase since 2002: the use of hydropower has shown an accelerated growth since 2002 and its output increased by 4.3% from 2011 to 2012. The share of the ‘new’ renewable energy sources solar, wind energy and biofuels also increased at an accelerating speed: from 1992 it took 15 years for the share to double from 0.5% to 1.1%, but only 6 more years to do so again, to 2.4% by 2012.

More permanent slowdown?

The small increase in emissions of 1.1% in 2012 (including a downward correction of 0.3% for it being a leap year), may be the first sign of a more permanent slowdown in the increase in global CO2 emissions, and ultimately of declining global emissions, if (a) China achieves its own target for a maximum level of energy consumption by 2015 and its shift to gas with a natural gas share of 10% by 2020; (b) the United States continues a shift in its energy mix towards more gas and renewable energy; and (c) in the European Union, Member States agree on restoring the effectiveness of the EU Emissions Trading System to further reduce actual emissions. These preliminary estimates have been made by PBL Netherlands Environmental Assessment Agency and the European Commission’s Joint Research Centre (JRC).

The report is based on recent results from the Emissions Database for Global Atmospheric Research (EDGAR) and the latest statistics on energy use and various other activities.


Jos Olivier, Greet Janssens-Maenhout, Marilena Muntean, Jeroen Peters


Publication title
Trends in global CO2 emissions: 2013 report
Publication date
31 October 2013
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