America's Future · 80th Anniversary · Cost per ton of CO₂
Earth Fund
Rank climate grants by cost per ton of CO₂ avoided — so a giving portfolio buys the most planet for the money. One honest metric across very different bets. Illustrative.
Portfolio dollars
$295M
CO₂ avoided
20.9 Mt
Blended cost per ton
$14.11/t
Best value first
★ Highest leverage: Clean cookstoves at $6.67/t
| # | Grant | $ (M) | CO₂ (Mt) | $/ton | Share | |
|---|---|---|---|---|---|---|
| 1 | ★ Clean cookstovesCommunities | $20M | 3 Mt | $6.67/t | 14% | |
| 2 | Methane capture (landfill)Industry | $45M | 6.5 Mt | $6.92/t | 31% | |
| 3 | Grid decarbonizationEnergy | $120M | 9 Mt | $13.33/t | 43% | |
| 4 | Tropical reforestationNature | $30M | 2 Mt | $15.00/t | 10% | |
| 5 | Direct air capture pilotRemoval | $80M | 0.4 Mt | $200.00/t | 2% |
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Tropical reforestation$15.00/t
Grid decarbonization$13.33/t
Methane capture (landfill)$6.92/t
★ Clean cookstoves$6.67/t
Direct air capture pilot$200.00/t
Portfolio: $295M → 20.9 Mt avoidedBlended $14.11/t
Transparent calculation log
earthfund · compute.log
$ earthfund compute --metric cost-per-tonloaded 5 grant(s)formula: $/t = grant_dollars / tons_avoided#1 Clean cookstoves: $20M / 3 Mt = $6.67/t#2 Methane capture (landfill): $45M / 6.5 Mt = $6.92/t#3 Grid decarbonization: $120M / 9 Mt = $13.33/t#4 Tropical reforestation: $30M / 2 Mt = $15.00/t#5 Direct air capture pilot: $80M / 0.4 Mt = $200.00/tblended portfolio: $295M / 20.9 Mt = $14.11/tportfolio fingerprint: 6013ec70status: ok · illustrative · no secrets used
The fingerprint is a deterministic hash of the ranked portfolio, so the same inputs always produce the same result. No secrets, no network calls.