In response to the large contribution of non-CO2 GHG to global warming, pricing of their emissions has been proposed as a cost-effective mitigation option. The authors find that such multi-GHG pricing can be more regressive than CO2-only pricing, with a relative increase in burden for low-income households.
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Nature
Distributional effects of expanding climate targets beyond CO2 | Nature Climate Change
Abatify Summary
Nature & Climate Perspective
**Expanding climate targets to include non-CO2 gases like methane and nitrous oxide significantly accelerates the cooling potential of Nature-Based Solutions (NbS) but requires more complex ecological accounting. **
- Methane and N2O mitigation in agriculture and LULUCF provides immediate atmospheric relief due to their high Global Warming Potential (GWP) relative to CO2.
- Integrated soil health management that sequesters CO2 must now be balanced against potential N2O emissions from nitrogenous fertilizer use to ensure net-negative ecosystem outcomes.
- Long-term ecosystem stability is enhanced by addressing short-lived climate pollutants (SLCPs) which drive rapid regional temperature spikes and threaten biodiversity hotspots.
Market & Policy Outlook
**The shift toward multi-gas targets creates new financial arbitrage opportunities while placing a disproportionate compliance burden on the agricultural and waste sectors in developing nations. **
- Regulatory alignment with Article 6.4 and ITMOs will likely see the introduction of specific methodologies for non-CO2 gases, potentially decoupling methane-based credits from standard CO2 pricing models.
- Corporate compliance via SBTi Net-Zero standards will force a radical shift in Scope 3 supply chain management as methane and HFCs are brought under the same auditing rigor as energy-related emissions.
- While ICVCM CCPs emphasize high-integrity additionality, inclusion of non-CO2 targets necessitates new guardrails to prevent 'hot air' credits from legacy industrial gas projects that do not provide holistic sustainability.
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