Global Warming Forecasts Alarmingly High, Says UN Report
A recent UN report warns that global temperatures could rise beyond previous estimates, even under best-case scenarios.
LONDON – A recent report from the United Nations has revealed that projections for global warming are now more concerning than previously thought. Even in the most optimistic scenario, average global temperatures are expected to increase by 1.7 to 1.8 degrees Celsius above pre-industrial levels by the middle of the century.
Immediate Action Required
Despite the swift growth of renewable energy sources and various climate policies in place to lower emissions across multiple nations, the report emphasizes that drastic and immediate reductions are essential to stay on track for the best-case outcome.
The report, released by the UN Environment Programme, outlines that greenhouse gas emissions must decline by 18% from 2025 levels by 2030, by 45% by 2035, and 69% by 2040. However, current national commitments are projected to only achieve a reduction of about 5% to 8% by 2030 and between 11% to 15% by 2035.
Alarming Future Predictions
The report forecasts a potential increase in global warming to 2.8 degrees Celsius by the year 2100 under existing policies. If countries adhere strictly to their current climate pledges, the increase may be slightly lower at 2.6 degrees Celsius. These figures have been upwardly revised, especially due to the United States' exit from the Paris Agreement, as well as updated evaluations of past emissions levels.
Upcoming Climate Talks
As nations prepare for COP31, the next major climate summit taking place in Turkey, UN Secretary-General Antonio Guterres stressed the importance of continued efforts to mitigate emissions that are contributing to catastrophic weather events like floods and wildfires.
“Overshoot is not surrender. We can still keep it as small and as short as possible – and bring temperatures back below 1.5 degrees Celsius by the end of the century,”
Guterres reiterated the commitment made under the 2015 Paris Agreement, where nations pledged to limit the global temperature increase to well below 2 degrees Celsius, aiming ideally for 1.5 degrees Celsius.
Revising Expectations for Overshoot
As it stands, limiting warming to 1.5 degrees Celsius without exceeding that threshold is no longer deemed achievable. The UN Environment Programme highlights a new “lowest possible” overshoot scenario that suggests there is roughly a 50% chance of returning temperatures to 1.5 degrees Celsius or lower by the end of the century.
The report also points out that climate initiatives submitted after 2025 have had negligible impacts on the projections for future warming. To achieve a return to 1.5 degrees Celsius, substantial carbon removal on a wide scale will need to occur, a process that remains uncertain in terms of its viability and effectiveness.