Beyond the Limits

The document examines the IPCC Working Group II report, emphasizing that temperature overshoot beyond 1.5°C leads to permanent ecological and human loss. It critiques the reliance on carbon dioxide removal (CDR) and solar radiation modification (SRM) as ineffective and hazardous alternatives to immediate emissions reductions. Finally, it asserts that climate adaptation and mitigation must be grounded in social justice, equity, and Indigenous knowledge to be effective.

• Exceeding 1.5°C of global warming, even on a temporary basis, results in irreversible damage to human and natural systems that cannot be undone even if temperatures later decline. Permanent impacts include sea level rise, the loss of large ice masses, and the inundation of coastal areas and small islands.
• Temperature overshoot increases the likelihood of triggering self-reinforcing feedback loops and climate tipping points, such as forest ecosystem collapse and permafrost thawing, which further amplify warming and make returning to lower temperature levels more difficult.
• Adaptation capacity is severely constrained as warming increases, with 'hard limits' being reached at 1.5°C. Beyond this threshold, ecosystem-based adaptation measures lose effectiveness, and risks of species extinction and biodiversity decline escalate.
• Reliance on large-scale Carbon Dioxide Removal (CDR) is considered risky and uncertain. The document notes that CDR may not be implementable at the required scale by 2050 and that the atmosphere's response to CO2 removal is not equivalent to the effect of avoiding emissions, meaning more CDR is needed to compensate for a given emission.
• Solar Radiation Modification (SRM) is identified as a dangerous strategy that masks warming without addressing greenhouse gas concentrations or ocean acidification. Potential side effects include ozone depletion, altered regional rainfall, and the risk of 'termination shock'—rapid warming if SRM is suddenly stopped.
• Effective climate responses must integrate social justice, equity, and Indigenous knowledge. The IPCC finds that rights-based approaches and the recognition of Indigenous land tenure and knowledge systems reduce vulnerability and increase resilience.
• To minimize irreversible loss and damage, the document argues for urgent, deep emissions cuts, specifically calling for a halt to all oil and gas expansion and a rapid phaseout of fossil fuel combustion.

APA

Center for International Environmental Law (2022). Beyond the Limits. https://www.ciel.org/wp-content/uploads/2022/02/CIEL_HBF_IPCC-WGII-Key-Messages-28Feb2022.pdf

Chicago

Center for International Environmental Law. Beyond the Limits. 2022. https://www.ciel.org/wp-content/uploads/2022/02/CIEL_HBF_IPCC-WGII-Key-Messages-28Feb2022.pdf.

Wikipedia

{{cite report |author=Center for International Environmental Law |title=Beyond the Limits |date=28 February 2022 |url=https://www.ciel.org/wp-content/uploads/2022/02/CIEL_HBF_IPCC-WGII-Key-Messages-28Feb2022.pdf |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{centerforinternationalenvironmentallaw2022beyond, author = {{Center for International Environmental Law}}, title = {{Beyond the Limits}}, institution = {Center for International Environmental Law}, year = {2022}, month = feb, url = {https://www.ciel.org/wp-content/uploads/2022/02/CIEL_HBF_IPCC-WGII-Key-Messages-28Feb2022.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }