Climate Equity · February 2026
Fair Share Trajectories: EMDE vs DM
Equity-weighted national emissions pathways for emerging and developed economies under different fair-share allocation rules.
- Allocation rules compared: grandfathering, equal per capita, ability to pay and historical responsibility.
- Each rule produces a different national carbon budget and implied annual reduction rate.
- Charts plot emissions trajectories to 2050 for selected developed and emerging economies.
- The gap between fair-share pathways and stated national targets is quantified per country.
The remaining global carbon budget can be divided between countries in many defensible ways, and the choice of rule largely determines whether emerging or developed economies face steeper cuts. Making these allocation rules explicit helps investors interpret sovereign alignment claims and national targets.
Trajectories are built from public emissions, population and income data and compared with stated national commitments. Signed-in visitors can switch between allocation rules and select countries to compare their implied pathways side by side.