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Stratospheric Aerosol Injection

The case for S.A.I.

If the green transition is the only answer, why does the math make it impossible before the damage is done?

This isn't about hope or catastrophe. It's about arithmetic — and what the numbers say about what actually happens next.

Annual warming damages — what the math actually looks like

2025 — Today

$220 billion

Current annual warming damages worldwide. Manageable. A rounding error at global scale.

2050 — Conservative minimum

$19+ trillion / year

Annual warming damages at the conservative floor of peer-reviewed projections — even assuming carbon neutral is achieved on schedule. And it stays there. Every year after that.

compared against
Green transition cost $9 trillion / year Maximum annual cost estimate, held constant. The warming damage is not constant — it compounds.

Numbers anchored at the conservative end of peer-reviewed ranges. The first video walks through the sourcing.

The humanitarian case for acting is real. It's also not the argument being made here. This is an economic argument — built on self-interest, because self-interest is what actually moves decisions at scale. If that framing seems cold, consider that it may be the only one with a realistic path to the outcome everyone wants.

The first video opens with an independent AI verification of the argument's conservatism. If you want to stress-test before committing to the rest, start there.

Written argument

The complete case in document form, for those who prefer to read.

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