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Global CO2 Emissions Back To Pre-Pandemic Levels: Study

Nov 5, 2021 | Pratirodh Bureau

Planning and build-up of liquified and other natural gas would add two billion tonnes of carbon dioxide equivalent (1.9 billion metric tonnes) a year to the air by 2030

Global carbon dioxide emissions have bounced back after COVID-19 restrictions and are likely to reach close to pre-pandemic levels this year, analysis released on November 4 has found.

The troubling finding comes as world leaders meet at the COP26 climate talks in Glasgow in a last-ditch bid to keep dangerous global warming at bay.

The analysis was undertaken by the Global Carbon Project, a consortium of scientists from around the world who produce, collect and analyse global greenhouse gas information.

The fast recovery in CO2 emissions, following last year’s sharp drop, should come as no surprise. The world’s strong economic rebound has created a surge in demand for energy, and the global energy system is still heavily dependent on fossil fuels.

Most concerning is the long-term upward trends of CO2 emissions from oil and gas, and this year’s growth in coal emissions, which together are far from trending towards net-zero by 2050.

The Global Emissions Picture

Global CO2 emissions from fossil fuels dropped by 5.4 per cent in 2020, compared to the previous year. But they are set to increase by about 4.9 per cent above 2020 levels this year, reaching 36.4 billion tonnes. This brings them almost back to 2019 levels.

We can expect another 2.9 billion tonnes of CO2 emissions this year from the net effect of everything we do to the land, including deforestation, degradation and re-vegetation.

This brings us to a total of 39.4 billion tonnes of CO2 to be emitted by the end of this year.

The fast growth in emissions matches the corresponding large increase in energy demand as the global economy opens up, with the help of $17.2 trillion in economic stimulus packages around the world.

CO2 emissions from all fossil fuel types (coal, oil and natural gas) grew this year, with emissions from coal and natural gas set to grow more in 2021 than they fell in 2020.

Emissions from global coal use were declining before the pandemic hit in early 2020 but they surged back this year. Emissions from global gas use have returned to the rising trend seen before the pandemic.

CO2 emissions from global oil use remain well below pre-pandemic levels but are expected to increase in coming years as road transport and aviation recover from COVID-related restrictions.

Nations Leading The Emissions Charge

Emissions from China have recovered faster than other countries. It’s among the few countries where emissions grew in 2020 (by 1.4 per cent) followed by a projected growth of 4 per cent this year.

Taking these two years together, CO2 emissions from China in 2021 are projected to be 5.5 per cent above 2019 levels, reaching 11.1 billion tonnes. China accounted for 31 per cent of global emissions in 2020.

Coal emissions in China are estimated to grow by 2.4 per cent this year. If realised, it would match what was thought to be China’s peak coal emissions in 2013.

India’s CO2 emissions are projected to grow even faster than China’s this year at 12.6 per cent, after a 7.3 per cent fall last year. Emissions this year are set to be 4.4 per cent above 2019 levels reaching 2.7 billion tonnes. India accounted for 7 per cent of global emissions in 2020.

Emissions from both the US and European Union are projected to rise 7.6 per cent this year. It would lead to emissions that are, respectively, 3.7 per cent and 4.2 per cent below 2019 levels.

US and EU, respectively, accounted for 14 per cent and 7 per cent of global emissions in 2020.

Emissions in the rest of the world (including all international transport, particularly aviation) are projected to rise 2.9 per cent this year, but remain 4.2 per cent below 2019 levels. Together, these countries represent 59 per cent of global emissions.

The Remaining Carbon Budget

The relatively large changes in annual emissions over the past two years have had no discernible effect on the speed at which CO2 accumulates in the atmosphere.

CO2 concentrations, and associated global warming, are driven by the accumulation of greenhouse gases, particularly CO2, since the beginning of the industrial era. This accumulation has accelerated in recent decades.

To stop further global warming, global CO2 emissions must stop or reach net-zero, the latter meaning that any remaining CO2 emissions would have to be compensated for by removing an equivalent amount from the atmosphere.

Carbon budgets are a useful way of measuring how much CO2 can be emitted for a given level of global warming. In the latest analysis by the Global Carbon Project, the carbon budget outlined by the Intergovernmental Panel on Climate Change (IPCC) in August this year has been updated.

From the beginning of 2022, the world can emit an additional 420 billion tonnes of CO2 to limit global warming to 1.5 degree celsius, or 11 years of emissions at this year’s rate.

To limit global warming to 2 degree celsius, the world can emit an additional 1,270 billion tonnes of CO2 or 32 years of emissions at the current rate.

These budgets are the compass to net-zero emissions. Consistent with the pledge by many countries to reach net-zero emissions by 2050, CO2 emissions need to decline by 1.4 billion tonnes each year, on average.

This is an amount comparable to the drop during 2020, of 1.9 billion tonnes. This fact highlights the extraordinary challenge ahead and the need to increase short- and long-term commitments to drive down global emissions.

Tags: CO2 emissions, COP26, COP26 climate summit, Global Carbon Project, global warming, greenhouse gas emissions, Intergovernmental Panel on Climate Change, Pratirodh

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