You’re really lucky, you know that? You didn’t have to wait your whole life to do something special. - Walter White

I find it funny that California is known for their ridiculous laws/regulations but we've now released over 100 balloons filled with sulfur dioxide into the stratosphere to cool Earth with zero interference. Meanwhile, Tennessee, Kentucky, Florida, and other states have or are trying to pass chemtrails bills while not understanding that they have zero jurisdiction past 66,000 ft or 20km which is where we deploy our aerosols. I feel bad for @ADoricko who is catching strays for trying to prevent droughts.

What if I told you that in just one month, my company can plant 4,166,667 magic trees anywhere in the world to provide shade? 4.1 million trees, spaced 17.5 feet apart can cover the entire city of San Francisco offering a natural shield from the sun's heat. Now, these aren’t ordinary trees. These magic trees have a unique ability: they migrate from where they were planted to the poles of the Earth. Over 1 year, they travel silently and efficiently, spreading their cooling effect globally. And then, like magic, they disappear. More magic trees = more cooling But here’s the real magic: these trees float 12.5 miles above us in the stratosphere. At @MakeSunsets, we specialize in stratospheric aerosol injection (SAI), a groundbreaking technology that mimics these magic trees. By releasing small amounts of sulfur dioxide (SO2) into the stratosphere, we create tiny reflective particles that disperse sunlight and provide a cooling effect, much like the shade of a vast forest. We know this works because the world experienced 0.5C of cooling for a year with the Mt. Pintabuo eruption, which sent 20 million tons of SO2 into the stratosphere in 1991. And it’s incredibly affordable. For just $35 a month, we can plant the equivalent of 1,260 trees that last for a year. Over 12 months, you will have offset your lifetime historical carbon emissions if you’re a 38-year-old in the US. That’s a small price for a significant impact on our climate. Imagine being part of a movement that cools the planet and fights climate change. With Make Sunsets, you can make a real difference. Join us in a cooler future today, and watch your magic trees work wonders from the sky. makesunsets.com/products/joi…

Measurement, Reporting, Verification of Stratospheric Aerosol Injection. Thank you @NOAA!!!

I'm never deleting this app.

Sounds like climate scientists... we don't actually know how climate works due to too many variables. Don't add anything to the atmosphere or unforeseen things will happen. We won't invite you to conferences, will scorn you for not publishing, mock you for lacking credentials, and accuse you of seeking quick profits. The people will eventually listen to us by stopping oil production and call upon us to save the world.

No, latex is not plastic. Latex is a natural, elastic material that comes from the sap of the rubber tree, also known as Hevea brasiliensis. The sap, called latex, is collected from beneath the bark of mature trees and is about 55% water and 40% rubber. The process of collecting latex is gentle and doesn't harm the tree, so it doesn't contribute to deforestation. Latex is also biodegradable.

Scientists have been gatekeeping Stratospheric aerosol injection since the early 1970s fine tuning their models and zero progress towards field deployments. We've broken the seal, and we're not stopping.

Hurricane Milton was created by space lasers, but it wasn't the left. It was a shadow government that increased the power of the laser in the Gulf of Mexico. This laser is the most powerful laser in the solar system, and the energy that hits Earth in 1 hour is equivalent to the energy of 9.93 billion nukes that were dropped on Hiroshima, it's called the Sun. A shadow government called the Internation Maritime Organization decided on January 1st, 2020 to weaken the laser shield that reflected some of the laser beams away from the ocean by reducing the sulfur pollution from the fuel that their ships burn to get your products from COUNTRIES YOU CAN'T ID ON A MAP or china to the US. So now the laser beams have been heating the planet since 2020. LOOK UP SHIPTRACKS it's CHEMTRAILS for the ocean air. So clearly we want to keep the oceans cooler right? Deflect some of the laser beams = Cooler ocean in Florida = weaker hurricanes. So there is the company called @MakeSunsets that observed that this shadow government stopped applying the laser shield. This is why 2023 was the hottest year in human history. They also learned a volcanic eruption in the early 90s did what the ships did, but in one shot, and the volcano placed the laser shield two times higher than where commercial airlines fly and cooled Earth by 0.9F or 0.5C for about a year. And guess what? @MakeSunsets decided to do just that—put the laser shield back up! Not by relying on cargo ships or waiting for a volcano to explode, but by releasing a small amount [1] of the same kind of sulfur particles into the stratosphere, just like that eruption in the '90s. It's not a conspiracy; it's basic physics. Less lasers hitting the ocean = less heat = weaker hurricanes. Instead of fearing shadowy plots, we could actually do something to cool things down. @MakeSunsets is doing what the ships stopped doing, but in a safer, more controlled way. It's time to stop freaking out about space lasers and start being proactive—because keeping the laser shield up works. FUN FACT: After the eruption of Mt. Pinatubo in 1991, there were less hurricanes. LOOK UP article "Major Volcano Eruptions Could Stymie Hurricanes." [1] The concentration of SO2 needed in the stratosphere to offset all man-made warming is less than the amount of SO2 commonly added to a bottle of wine to preserve it. So drink up and help us cool Earth.

The more I think about it, the clearer it is: this is a gift for solar geoengineering. Two years ago, hardly anyone had heard of stratospheric aerosol injection (SAI). Today, the governor of Florida just backed a bill to try and ban it. That’s not a setback. That’s fuel, and it's only getting hotter. Now his opponents have a perfect opportunity to call him out for ignoring basic climate science. They can score political points with their followers by supporting something that actually works and position themselves as the sane, science-first side. And the best part? The chemtrail conspiracy crowd is going to run wild with this. They’re going to flood the internet with noise. But all that noise turns into attention. And attention turns into curiosity. And when curious people actually look into SAI, they'll find something real. Just like flat-earthers got clowned out of the conversation, chemtrailers will too. But this time, that backlash will shine a spotlight on a solution that could literally buy humanity more time. Time to stop polluting the air we breathe with gases that trap heat. Time to remove the trillion tons of carbon we’ve dumped into our atmosphere. And time to push humanity forward—toward a future where we control our climate, not the other way around. A future where we're no longer helpless in the face of wildfires, floods, and catastrophic storms, but equipped to defend ourselves against them. This isn’t a crisis. It’s the beginning of the conversation. Giddy up. nitter.app/GovRonDeSantis/status/… @GovRonDeSantis thank you for accidentally helping humans cool Earth.

Fun fact, it only takes 124 balloons filled with sulfur dioxide deployed into the stratosphere to start the stop of global warming. linkedin.com/posts/steven-m-…

Over 860 people (including Casey) pay me to send sulfur dioxide into the stratosphere, this is a weird thing people pay for and we're almost profitable. Stop selling SaaS.

Stratospheric Aerosol Injection is Ozempic for climate change.

SO2 emissions is the only reason we are not living in a 2C+ world and we are reducing it YoY. This is going to get gnarly if we don't start shifting some of the SO2 emissions higher in the stratosphere where there are no 🌧️ to rain out and diffuses quickly to protect us from further heating up the GHG layer in our troposphere (where you and I live).

Yesterday, on Earth Day, we launched two drones to test autonomous return-to-home… and both succeeded! Here’s the video of one of the drones reaching ~41,322 ft, separating from a balloon, and beginning its 18-mile journey back. 1:04 The drone cruises back with a view of the San Francisco skyline and the Bay Bridge before banking to the landing zone. 2:27 The drone nails the landing at the pre-determined LZ. Look familiar? Now, we can deploy better telemetry and cameras to verify deployments—no need to recover gear in the field. That means more data, less losses, and faster iterations to cool Earth. Help us accelerate faster by buying Cooling Credits.

This is my Jensen Luckey phase.

@CJHandmer doing his thing. piped.video/cRg1ZVwttNU?si=DZ-x…

The chemtrails people have discovered @makesunsets, trying to get enough engagement to be paid by X and then use the funds to deploy more SO2 into the stratosphere. Inshallah.

Holy shit. It's only January, but I think this is the best tweet of 2025.

You're welcome.

$3 per year from every American to globally cool Earth. Thanks @jasoncrawford for the shoutout!

Can they read this and solve climate change? cremieux.xyz/p/from-pollutio…

99% of the time the sales rep would really appreciate that you responded with that email instead of ignoring them.

It's not "pollution," it's Sunscreen for Earth. India is already artificially cooling itself using ground-level sulfur dioxide emissions. If they shift the ~11 million tons of SO2 from the air they breathe, higher, next to the Ozone Layer, they could cool the entire Earth by ~1°C.

And we only need to launch 300,000 African elephants worth of sulfur dioxide in the stratosphere per year to erase the warming effect until we can figure out how to remove the 300 billion African elephants worth of CO2.

Big thanks to @tomaspueyo for sharing what SAI can do to help cool Earth to his community and everyone else who chipped in. So far with just ~16 pounds of SO2 into stratosphere is the equivalent of 329,455 🌲s that last for a year for $7k. Thank you!

I realized this back in 2018 when I saw a video of a US drone company showcasing its technology for a data labeling project. The drone was able to lock onto humans hiking through the woods and continued tracking them even when trees obstructed its view. The participants were also playing hide-and-seek, but the drone managed to keep up. I thought to myself, "Why are they marketing this as a consumer product? Just strap a bomb to it and sell it to the military."

Climate scientists hate him for this weird trick that reverses global warming for $10 billion annually.

8,000 pounds of SO2 in the stratosphere would offset the warming caused by 3.6 million tons of CO2 for a year. nasa.gov/centers-and-facilit…

More CO2 = warmer Earth Warmer Earth = Warmer Oceans Warmer Oceans = more intense hurricanes More intense hurricanes = more dead people and property loss Can't nuke hurricanes and can't stop dumping CO2 into our atmosphere. Solution. Copy volcanos by putting less than the concentration of SO2 in a bottle of wine into the stratosphere to cool Earth back to the 1850s. Repeat once a year until we transition off fossil fuels and scale up CO2 removal.

Slight correction, the balloon you saw popping was the equivalent of 38,636 trees worth of carbon offset that lasts for a YEAR. The last 12 balloons we launched averaged 1.66kg of SO2, so 79,048 trees.

I've never considered myself an activist, but I guess my father never considered himself an environmentalist either. My father played a key role in building the LCD industry—the same screen you’re looking at right now to read this. He sold inspection equipment to Samsung and LG, and if there’s ever a pixel defect on your screen, it’s because the machine he sold didn’t catch it during production. But thanks to companies like Photon Dynamics, most screens today are defect-free. To give you some perspective, in 1999, a 15-inch LCD panel cost $1,500, which is around $3,000 in today’s dollars. Now, you can get a similar panel for less than $10 on Amazon. Imagine all the trees he saved since everyone now has pretty much every written word by humankind in their pocket. Not sure where I was going with this post, but maybe I'm just a chip off the old block and like any son, I'm trying to one up him 😂. I wonder what my sons will do.

I'm sure these people who want to stop people from geoengineering/weather modification mean well, but it's hilarious that they tried to shut us down and crashed into the rocks of the government: nitter.app/newstart_2024/status/1…

Balloons are easier and cheaper. caseyhandmer.wordpress.com/2… CC: @CJHandmer

1/ For my startup friends who don’t yet grasp what it means when I say global temperatures have sustained 1.5°C for over a year: Humanity is default dead rn. If we don’t go full founder mode, it's only going to get hotter, and then we’re done. 🧵

If you want to help us legally cool Earth, here's how makesunsets.com/products/joi…

As a reader of Make Magazine, I am pumped to see this in print. Here's the material list you need to cool Earth yourself makesunsets.com/collections/…

Fun fact: International airspace begins at 60,000 feet. Even more fun fact: We deploy SO₂ at 66,000+ feet, comfortably in international territory. The Florida government’s latest bill to "ban" stratospheric aerosol injection is like trying to outlaw clouds over Miami is cute, but pointless. Rest assured, we have no intention of deploying SO₂ in state airspace; the stratosphere simply has better views (and results). Godspeed @ADoricko

Monkey see, monkey do.

Maybe he discovered immortality, just make gates and you'll live forever.

Fun fact: Klyuchevskoy is a stratovolcano—just like Mt. Fuji and Pinatubo. 🌋 Its latest ash plume shot up ~9–10 km, and because it’s so far north, that’s right around where the stratosphere begins. In other words, this eruption may have just pulled off a natural stratospheric aerosol injection.

Scientist gatekeeping continues cc: @micsolana @paultoo

4th balloon, that's all folks!

Because he makes too much money? That's a strange reason. The Olsen twins were worth ~$100 million before attending NYU from that Full House $$$. I am not sure why they attended, but it was pretty fun running into them in elevators going to class.

I don't understand when I tell YC founders in group chats that they should stop selling SaaS and I point to @bscholl as inspo and they get flustered. You got accepted into the most elite startup program in the world. Why are you trying to optimize some KPI for some fuckface manager that will churn unless you stroke his ego? I'm fairly certain you had a dream growing up, it wasn't selling SaaS. You made it. Dream HARD.

Contrary to popular belief and a bad game of telephone that has reached the EPA. Mexico has not banned Stratospheric Aerosol Injection.

Former forensic economist here, corporate death penalties are pretty rare, even more so for corporate spying. Most likely will result in fines, settling, or restructuring. Also loss of business from reputational damage. Probably no jail time.

Maybe I've been approaching this Stratospheric Aerosol Injection as a service all wrong. We currently emit 69 million tons of SO2 in the air we breathe. What if I just focused my efforts on making that 69 million go to zero by the end of the year. I could probably get all the people who freak out and send death threats because we've sent about 100kg of SO2 into the stratosphere on behalf of our customers to lobby for zero SO2 emissions. Then we would live in a 1.9C world. I've been deploying SO2 higher in the stratosphere since October 2022. Let's fucking judo flip these climate denialists and make them scream at their pandering political leaders that there should be zero SO2 in our air and see what happens. Maybe then we'll take SAI seriously.

Moral hazard just became a moral obligation to deploy sulfate aerosols in the stratosphere to cool Earth.

It's like staring down the barrel of a gun in slowmo. Who wants to help me deploy a shield so we don't get shot?

Cool, we should scale up deployments of sulfur dioxide in the stratosphere to decouple the emissions from the warming until capitalism figures out a better energy source.

Exhibit A It's truly maddening that MSM portrays our efforts as adversarial to create conflict that doesn't exist. Meanwhile, I've been exchanging notes and ideas with those mentioned in the article.

What the actual fuck.

A summary of all academic papers re: solar geoengineering. It works, but here are all the extreme and insane scenarios that will make it go bad and is clickbait porn for reporters who don't report how much SO2 is needed to make made-up bad things happen and in what scenario.

@CJHandmer dropping knowledge @CERAWeek!

Um, where do you think AI was first introduced? Hint, it wasn't a calorie-counting app company.

Spoiler alert: SAI works and you can do it yourself. In 18 months, two dudes with 68 balloons base on consumer demand have planted 1.6 million trees that last for a year. Here's how you can get started: makesunsets.com/collections/…

Great article by @USATODAY

The playground industrial complex strikes again.

With the devastating floods that hit Texas over the 4th of July weekend, my heart goes out to everyone affected. These disasters are no longer rare; as our world heats up, more energy in the atmosphere leads to more extreme and unpredictable weather events. But we’re not powerless. Just a few weeks ago, before this flood. I joined @_protopian of @sorcerer_earth, @ALevy of @atmo_ai, @matvogels of @HarpoonVentures, on the @blackflagvc podcast to talk about how we can take real action to predict, prepare for, and actually prevent the worst impacts of these climate-driven disasters. If you want to move beyond worry and be part of the solution, listen in. (link in the reply)

I see your XXL fry, and raise you "potato party" dailymail.co.uk/news/article…

Cooling Credits are now tax deductible: donorbox.org/solar-geoengine…

Chemtrailers found us last Sunday. See the spike? Like sulfate aerosols in the troposphere, their attention had a short residence time and a short-lived impact. Coincidence? Maybe not… Long-term SO₂ exposure is linked to brain damage and most ground-level SO₂ emissions are near industrial areas where poorer people live. These people don't even have a chance unless you f*ck a couch and get into Yale law school. For scale: In 2022, humans emitted ~73 million tons of SO₂ into the troposphere, which cools Earth by ~0.5°C. If that stopped tomorrow, we’d be living in a hotter world. We can deploy a tiny fraction of that into the stratosphere, where it lasts 1–3 years and cools the planet in a safe and efficient manner.

I think I have you beat. A VC changed their family's summer vacation plans and brought his wife and two young children to launch some balloons filled with SO2 and helium in the boonies of San Jose, CA.

Hey @sama congrats on the $500B raise. Can you spend less than 1% of that to offset the warming caused with stratospheric aerosol injection until Stargate transitions to nuclear power? nitter.app/i/grok/share/yGriN5xjH…

For the econ nerds out there, Alex repping Make Sunsets.

Update: @MakeSunsets has raised ~$1.82M to date. We've spent ~$900K since October 2022 and offset the warming from 128,005 tons of CO₂ for a year. Our all-in cost to deploy 1 Cooling Credit is $7.03.

We can also take sulfur from sour gas or oil and send it into the stratosphere to offset the warming effect of burning the oil until we scale up solar, nuclear, fusion, wind, and batteries.

I had a fun chat with a fellow @ycombinator founder, @thedanielmazur, on his podcast. We dove into many different subjects, and hopefully, our conversation shows the real me vs. interacting with randos on X. Please listen if you're a founder, parent, or care about the climate. Link in the reply. 👇

🌋 In Jan 2022, the Hunga volcano erupted underwater and without trying cooled the Southern Hemisphere by ~0.1°C through 2023. No disaster. No doom. Just a reminder: Mother Nature has been showing us how to cool the planet for centuries.

It's wild that we're featured at 1:19

when someone criticizes me or tells me what I'm doing is foolish, I research their backgrounds and realize they've never taken a risk or they've never accomplished anything by themselves and played it safe by wrapping themselves in some fancy institution. I feel bad for these people, they seem smart, but deep down they are cowards with no agency because they are afraid of what others will think if they fail. "be not afraid." - JFC

Solar geoengineering "could wreak havoc on weather." Oh so I guess the weather is just fine now, right?

Kinda wild that I have a non-negligible shot at cooling Earth by sending some balloons up into the stratosphere. Giddy up.

You're just early. You have to give people time to catch up.

I'd pick, 'Beat it - Michael Jackson'

Testing return to home, 1,500g SO2 payload.

A fun example of this is nissan.com. If I remember correctly, he was able to keep the domain because of his last name and had some kind of IT business. Nissan Motor Corp tried different ways to get it from him, but it looks like the domain has been memorialized.

We're going to find out. Link in the reply.

@MakeSunsets x @TerraformIndies Cool Earth x Unlimited energy

Start up founders, if you don't get hate mail, you're not working on anything important.

pretty neat Prompt: I'd like to research stratospheric aerosol injection and create a table that shows the amounts of SO2 in metric tons needed in the stratosphere along with the variables like attitude, latitude, longitude, particle size, and how many years we need to do it for to trigger acid rain, make the sky white, effect monsoon patterns, decrease crop yield, change rain patterns, and any other negative side effects of stratospheric aerosol injection to show normal people what is the dosage needed for these things to happen and educate them that we would never need to go to these limits to get the sustained cooling effect of 0.5C for 20 years. Also, review these papers to see if they are relevant to the task Lemon, A., Keith, D. W., & Albers, S. (2025). Under a not so white sky: Visual impacts of stratospheric aerosol injection. Environmental Research Letters, 20(2), 024060. doi.org/10.1088/1748-9326/ad… Fan, Yuanchao, Jerry Tjiputra, Helene Muri, Danica Lombardozzi, Chang-Eui Park, Shengjun Wu, and David Keith. 2021. “Solar Geoengineering Can Alleviate Climate Change Pressures on Crop Yields.” Nature Food 2 (5): 373–81. dash.harvard.edu/server/api/… Crutzen, P. (2006). Albedo enhancement by stratospheric sulfur injections: A contribution to resolve a policy dilemma? Climatic Change, 77, 211–220. doi.org/10.1007/s10584-006-9… Keith, D. W., Weisenstein, D. K., Dykema, J. A., & Keutsch, F. N. (2017). Stratospheric solar geoengineering without ozone loss. Proceedings of the National Academy of Sciences, 114(12), 3110-3115. doi.org/10.1073/pnas.1615572… Harding, A., Vecchi, G. A., Yang, W., & Keith, D. W. (2024). Impact of solar geoengineering on temperature-attributable mortality. Proceedings of the National Academy of Sciences, 121(52), e2401801121. doi.org/10.1073/pnas.2401801… Robock, A. (2000). Volcanic eruptions and climate. Reviews of Geophysics, 38(2), 191-219. doi.org/10.1029/1998RG000054 Results from @ConsensusNLP consensus.app/search/id-like…

I'm from the future folks and I see more beautiful sunsets on the horizon.

5/ A few grams of sulfur can offset tons of CO₂ warming. It’s technically simple—it mirrors volcanic cooling, a natural process that has worked for millions of years. It won’t fix everything. But it buys us time. And time is the difference between success and failure.

So @pronounced_kyle and I have been chatting about offsetting the warming caused by 1 Starship launch for a year. Apparently it's 76,000 tons of CO2 equivalent. We need $76,000 and we'll launch the equivalent amount of balloons (19 x 4,000g latex balloons) and document and video the whole thing. Anyone interested in helping us?

My life was extended after meeting @bryan_johnson

Showing Grandma how to cool Earth.

Happy Valentine's Day to all the single dads with full physical and legal custody of their kids. Keep going, you're doing great. And if you're not, send me a DM, I'd love to listen and help.

Less than $1 billion to reduce global temperatures. Imagine what we could be spending the other $999 billion on instead of climate damages.

If more reporters wrote about, "How much SO2 can you put in the stratosphere before it becomes a health hazard?" We would have solved climate change back in the 1980s.

We're just getting started folks.

One thing this article didn't cover is the sheer volume of human capital needed to build these DAC plants and the opportunity cost of doing something else. Apparently we don't even have enough welders to scale. Who's working on this? news.mit.edu/2024/reality-ch…

Watch how @MakeSunsets is cooling Earth with one simple trick. Climate change denialists hate him!

What if I could teach Antoine to plant the equivalent of 4.7 million trees that last for a year in 24 hours? He wouldn't have to worry about watering them or catching on fire and a 200x improvement on output.

I find it funny when people give advice on how to scale up stratospheric aerosol injection as a service. They seem so confident in their recommendations and tell me I'm doing it wrong. Okay fuck face, go raise $1.9 million from the top VCs in the world and convince over 850+ of the smartest people on this planet to use your service instead. Please, put me out of my misery. You clearly have all the fucking answers, you piece of shit. Except—oh wait—you don’t. Because there has never been a commercial stratospheric aerosol injection company before. There is no playbook. No incumbents. No tried-and-true strategy. Just us, figuring it out in real time, taking the punches, and making it happen. The reality is, most business advice is built on analogy. "Do what Uber did." "Copy Tesla's playbook." But guess what? Nobody is running a startup where you sell a gas molecule to cool the fucking planet. Nobody is navigating the regulatory, scientific, and public perception shitstorm that comes with it. So unless you’ve personally run a company that deploys sulfur into the stratosphere for climate cooling, kindly shut the fuck up. Or better yet—beat me at my own game. I dare you.

Dear @POTUS, this is a good idea, let's just do it now. Why are we waiting for an election, we need talent from around the world to ramp up manufacturing to build cool stuff.

SAI makes the most sense to curb global temps—low cost, proven by volcanic cooling, no billions in gov funding needed to show effectiveness. Climeworks & Occidental’s DAC? Dead on arrival, now at Death's door with DOE cuts. I covered this in February keepcool.co/p/no-one-is-comi…

A modest proposal: cremieux.xyz/p/from-pollutio…

A lot of dumb people are going to be disappointed when this bill passes and they still see contrails from airplanes over their heads.