andyjsong

MakeSunsets has raised ~$1.8M from angels + VCs and another ~$133K in Cooling Credit sales over the past 12 months from individuals [1]. These purchases directly fund stratospheric aerosol injection — bringing awareness and cooling the Earth.

We’ve applied to SBIRs, explored DAOs, crowdfunding platforms, and are in conversations with family offices and UHNWI.

Most of our closed deals? They’ve come from Twitter and Substack. The key: talking directly to decision-makers — not committees.

[1] Climate dads: https://cdn.shopify.com/s/files/1/0685/0042/2976/files/Make_...

What took you so long? :) The book came out in 2021. He's even written about Make Sunsets in his substack: https://x.com/MakeSunsets/status/1871734075008115081

Augment and repair are not the right words here. Since the Industrial Revolution, we've already been cooling the Earth by influencing radiative forcing; we're just doing it the worst way possible, by applying sunscreen at the wrong altitude (troposphere) and using too much of it.

Here's further reading if you'd like to learn more https://www.keepcool.co/p/no-one-is-coming-to-save-us-time-t...

TL;DR India should be hotter, but due to sulfur dioxide emissions at ground level the rate of warming is a third less. For reference, the current rate of warming is ~0.25C per decade.

Risk vs. Benefits: https://marginalrevolution.com/marginalrevolution/2025/01/ma...

Or the scientist Bill Gates calls when he wants to learn about climate change: https://makesunsets.com/blogs/news/optional-climate-change

If you want to understand the risks of doing vs. not doing SAI check out this recently published paper: https://climate.uchicago.edu/insights/comparing-the-benefits...

The next step is to redeploy the SO2 that has unintentionally cooled Earth and do it better in the stratosphere with a fractional amount that we've tolerated since the start of the Industrial Revolution.

Here's an article I recently wrote if you want to understand from a macro-level: https://www.keepcool.co/p/no-one-is-coming-to-save-us-time-t...

The last point about "fossil fuels can continue" is also called moral hazard. Regardless of SAI or not, we're going to keep using whatever is the cheapest and accessible fuel we have available, and right now, it's hydrocarbons pulled from the ground. We've already gotten good at recklessly warming our planet and unintentionally cooling it, so we might as well get good at cooling intentionally.

The specific experiment mentioned in the article was halted due to a lack of community engagement. The organizers failed to inform or invite the local mayor to the deployment event, leading to public backlash when residents learned about it from the New York Times. Much of the misunderstanding came from a perception that the experiment involved risky technology, though in reality, it was as simple as using a patio mister mounted on a retired warship.

What I was referencing, however, is Stratospheric Aerosol Injection (SAI), which differs significantly from MCB in both the type of aerosol used (typically sulfur dioxide, SO₂) and the location of the injection (the stratosphere, rather than the lower atmosphere). If you're interested in learning more about SAI, here's an excellent primer: https://unchartedterritories.tomaspueyo.com/p/so2-injection