Earth’s on track to warm above 2C despite climate action: Report

Global temperatures will increase between 2.1 and 2.9C by the end of the century even if all climate promises are kept, according to a UN report.

Government plans to cut greenhouse gas emissions aren’t enough to avoid catastrophic global warming, with the planet on track to heat up between 2.1 and 2.9 degrees Celsius by the end of the century compared to pre-industrial times, according to a new report from the United Nations Framework Convention on Climate Change.

Earth’s on track to warm above 2C despite climate action: Report (AFP)

Despite some progress in the last year, governments need to do more by 2030 to ensure that the global temperature increase is below 2C and ideally closer to 1.5C — the goal set in the Paris Agreement reached in 2015. The UNFCCC reached its conclusions by analyzing all national climate plans, also known as nationally-determined contributions or NDCs, submitted since 2015.

If all plans to cut greenhouse gas emissions are fulfilled, global emissions will total 52.4 billion metric tons of carbon dioxide equivalent in 2030, down 0.3% from 2019 levels, indicating that emissions could peak before the end of this decade, the report said. Last year, the UNFCCC estimated emissions would continue rising and reach 54.9 billion metric tons by 2030.

Climate scientists estimate that human-caused greenhouse gas emissions need to halve by the end of this decade, and to be eliminated by mid-century in order to keep warming below 2C by 2100. While the consequences of planetary heating above that threshold are deemed to be catastrophic, today’s warming of 1.1C above pre-industrial times has already resulted in irreversible changes, according to the latest report from the UN Intergovernmental Panel on Climate Change.

Extreme weather events have exposed millions of people to food insecurity and malnutrition; heat-related deaths have increased; and climate migration has risen. Agriculture, tourism and fishing are seeing losses. Rich countries that are most responsible for historical CO₂ emissions also have the most resources to adapt, while poorer countries that have contributed little to climate change face the brunt of the shocks.

Signatories to the Paris Agreement are increasing their ambitions, but not fast enough, the UNFCCC analysis shows. Even if all country promises are fulfilled, there would still be an excess of 16 billion metric tons of CO₂ above the threshold required to keep global warming at 2C.

The wide range in the warming estimates — between 2.1C and 2.9C — is due to uncertainty over whether countries can implement their plans. If emissions are not reduced sufficiently by 2030, cuts will need to be much sharper after that date to compensate for the slow start on the path to net zero, the requisite for halting global warming, the UNFCCC report said.