Natural Climate Solutions MACC Explorer

Governments and corporate buyers rarely fund a single carbon project — they build a portfolio across afforestation, mangrove ("blue carbon") restoration, soil carbon farming and avoided deforestation, because each pathway has a different cost curve, sequestration rate and realistic land ceiling. This 2D companion renders the exact same saturating cost-curve economics as a live marginal-abatement-cost curve (MACC) — the same chart form used by the IPCC and McKinsey for real-world abatement portfolios — plus four small diminishing-returns plots, one per pathway, so you can see directly why spreading a budget across pathways beats dumping it all into the cheapest-looking one. Live readouts track total CO₂ sequestered per year, total land committed and the blended cost per tonne, and a "cheapest-first" button shows what a purely cost-minimising allocator would choose.