FAQ

We launch reflective clouds into the stratosphere.

2-3 years.

Shorthand is that "a gram offsets a ton:" one gram of sulfur delivered to 20km altitude creates as much radiative forcing as one ton of CO₂ released in the atmosphere does in a year. There's a lot of uncertainty and assumptions here (including a 3x difference among IPCC scientists on global warming per unit CO₂ ). As we perform more releases, we'll learn a lot more about our efficacy. However, uncertainty isn't an excuse for inaction.

They are not water vapor, so in a technical sense no. In a "cloud of dust" sense, they are ;)

Yes. In the United States, our method to cool Earth falls under the Weather Modification Act. As required, we report yearly to NOAA.

Any human-caused release of carbon dioxide is geoengineering: the earth is a bit warmer for every breath you take. We think it's wrong to suddenly draw a line at the stratosphere: we screwed up the atmosphere, and now we have a moral obligation to fix things!

And we would like an equitable future with breathable air and no wet bulb events for generations to come. Convince us there's a more feasible way to buy us the time to get there and we'll stop. We'll happily debate anyone on this, just confirm an audience of at least 100 people and we'll find the time to try and convince you 😉

Maybe! We have no religion about how we produce the cooling we need and want the most cooling per $ we can safely + quickly achieve. Personally, we lack the $B+ startup costs (and substantial political capital) for these other methods. If you or your government are credibly attempting to build one of these, we'd be happy to collaborate

We fly instrumentation to verify latitude, longitude, and altitude of deployment. If a launch doesn't reach 20km, the Cooling Credits do not count and we redeploy. When we scale to 1M+ Cooling Credits per month, we'll measure and learn more.

We can create sufficient cooling to offset this year's new warming for ~$30M per year: $7M of sulfur + deployment costs.

No: it's likely much worse. We're very unlikely to stop mining proven petroleum reserves, and even the worst-case IPCC projections of 4C by the year 2100 don't include any massive natural releases of greenhouse gases (tundra methane, etc.). We need to act now to Cool Earth!

None: we're only addressing the warming impact of greenhouse gas emissions.

Because we're aiming for 70% margins;) It costs us ~$0.28 per Cooling Credit successfully deployed. You can see a breakdown of our costs here.

We used helium at first because we were nervous about Hindenburg 2.0s. Having better educated ourselves, we now use hydrogen for the vast majority of our deployments.