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Make Sunsets

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We Cool Earth by launching reflective clouds.

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Yesterday, we launched 3 biodegradable latex balloons to the stratosphere and released reflective sulfur aerosols to cool the Earth. Together, they offset the warming of ~5,855 tons of CO₂ for one year (equivalent to the annual emissions of 1,272 cars). Watch the launches ↓ 1 of 3 Balloons Launch Date: Oct. 30th, 2025 Balloon Weight: 1,515 grams SO₂ Payload: 1,985 grams Injection Altitude: 27,259 meters Delivery: Kaymont HAB-TX-1500 weather balloon

Yesterday, we launched 3 biodegradable latex balloons to the stratosphere and released reflective sulfur aerosols to cool the Earth. Together, they offset the warming of ~5,855 tons of CO₂ for one year (equivalent to the annual emissions of 1,272 cars). Watch the launches ↓ 1 of 3 Balloons Launch Date: Oct. 30th, 2025 Balloon Weight: 1,515 grams SO₂ Payload: 1,985 grams Injection Altitude: 27,259 meters Delivery: Kaymont HAB-TX-1500 weather balloon

1,059,854 views

Earlier this week, we deployed ~12.99 pounds of sulfur dioxide (SO₂) into the stratosphere, including one launch that reached an altitude of 101,400 feet. These deployments offset the warming effect of 5,895 metric tons of CO₂ for a year. In under three hours, we achieved the climate-cooling equivalent of planting 267,954 mature trees. 🧵1/2

Earlier this week, we deployed ~12.99 pounds of sulfur dioxide (SO₂) into the stratosphere, including one launch that reached an altitude of 101,400 feet. These deployments offset the warming effect of 5,895 metric tons of CO₂ for a year. In under three hours, we achieved the climate-cooling equivalent of planting 267,954 mature trees. 🧵1/2

207,642 views

Make Earth Cool Again. Yesterday, we had special guests 𝔊𝔴𝔢𝔯𝔫 and Alice help us deploy reflective clouds next to the Ozone layer to cool Earth. In total we launched four balloons and placed ~7.25 pounds of sulfur dioxide (SO₂) close to the Ozone layer, including one launch that reached a height of 101,358 feet. These deployments offset the warming effect of 3,290 metric tons of CO₂ for a year. We achieved the climate-cooling equivalent of planting 149,545 mature trees that last for a year.

Make Earth Cool Again. Yesterday, we had special guests 𝔊𝔴𝔢𝔯𝔫 and Alice help us deploy reflective clouds next to the Ozone layer to cool Earth. In total we launched four balloons and placed ~7.25 pounds of sulfur dioxide (SO₂) close to the Ozone layer, including one launch that reached a height of 101,358 feet. These deployments offset the warming effect of 3,290 metric tons of CO₂ for a year. We achieved the climate-cooling equivalent of planting 149,545 mature trees that last for a year.

143,157 views

Yesterday, we deployed seven biodegradable natural latex balloons with measured sulfur dioxide and hydrogen. All reached the stratosphere. Telemetry confirmed 10,525 Cooling Credits reached 20km+, offsetting 10,525 metric tons of carbon dioxide warming for a year. This is the equivalent of 478,409 mature trees that last for a year done in 2 hours. Here is a thread on all seven launches with details: 1st of 7 Balloons Launch Date: July 23, 2025 Balloon Weight: 1,515 grams SO2 Payload: 1,385 grams Injection Altitude: 23,755 meters Delivery: Kaymont HAB-TX-1500 weather balloon

Yesterday, we deployed seven biodegradable natural latex balloons with measured sulfur dioxide and hydrogen. All reached the stratosphere. Telemetry confirmed 10,525 Cooling Credits reached 20km+, offsetting 10,525 metric tons of carbon dioxide warming for a year. This is the equivalent of 478,409 mature trees that last for a year done in 2 hours. Here is a thread on all seven launches with details: 1st of 7 Balloons Launch Date: July 23, 2025 Balloon Weight: 1,515 grams SO2 Payload: 1,385 grams Injection Altitude: 23,755 meters Delivery: Kaymont HAB-TX-1500 weather balloon

79,543 views

Yesterday we sent a biodegradable balloon to 92,706 ft with 2,260 g of SO₂ and hydrogen lift. Same physics that cooled Earth after Mt. Pinatubo in 1991, now done on purpose. This one flight ≈ 2,260 tCO₂-year cooled or ~102,727 mature trees that last a year. Want us to scale this? Join here

Yesterday we sent a biodegradable balloon to 92,706 ft with 2,260 g of SO₂ and hydrogen lift. Same physics that cooled Earth after Mt. Pinatubo in 1991, now done on purpose. This one flight ≈ 2,260 tCO₂-year cooled or ~102,727 mature trees that last a year. Want us to scale this? Join here

37,238 views

Yesterday, we deployed three balloons with a total payload of 6,075 grams of sulfur dioxide (SO2) into the stratosphere, decoupling the warming of 6,075 tons of CO2 for a year. 🌍 🌳That’s like planting 289,285 trees that last for a year! 🌳 Bonus: We made history with the first-ever balloon launch carrying the largest SO2 payload into the stratosphere—3,095 grams in a single 4kg balloon! Special thanks to nvo and Tom Eliot for documenting the launch and helping us cool Earth.

Yesterday, we deployed three balloons with a total payload of 6,075 grams of sulfur dioxide (SO2) into the stratosphere, decoupling the warming of 6,075 tons of CO2 for a year. 🌍 🌳That’s like planting 289,285 trees that last for a year! 🌳 Bonus: We made history with the first-ever balloon launch carrying the largest SO2 payload into the stratosphere—3,095 grams in a single 4kg balloon! Special thanks to nvo and Tom Eliot for documenting the launch and helping us cool Earth.

29,639 views

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Yesterday, 7 more balloons carrying ~22 pounds of sulfur dioxide were launched, and 6 made it to the stratosphere to cool Earth. This is the cooling equivalent of 476,190 mature trees that last for a year. Thank you to our awesome customers who made it happen.

Yesterday, 7 more balloons carrying ~22 pounds of sulfur dioxide were launched, and 6 made it to the stratosphere to cool Earth. This is the cooling equivalent of 476,190 mature trees that last for a year. Thank you to our awesome customers who made it happen.

831,448 views • 1 year ago

Big thanks to all the people who came out today to help us cool Earth. This was the third balloon with a payload 1,030 grams of SO2. It's still traveling to the stratosphere and if reached will be the equivalent of planting 49,047 trees that last for a year.

Big thanks to all the people who came out today to help us cool Earth. This was the third balloon with a payload 1,030 grams of SO2. It's still traveling to the stratosphere and if reached will be the equivalent of planting 49,047 trees that last for a year.

594,786 views • 1 year ago

Earlier this week, we deployed ~12.99 pounds of sulfur dioxide (SO₂) into the stratosphere, including one launch that reached an altitude of 101,400 feet. These deployments offset the warming effect of 5,895 metric tons of CO₂ for a year. In under three hours, we achieved the climate-cooling equivalent of planting 267,954 mature trees. 🧵1/2

Earlier this week, we deployed ~12.99 pounds of sulfur dioxide (SO₂) into the stratosphere, including one launch that reached an altitude of 101,400 feet. These deployments offset the warming effect of 5,895 metric tons of CO₂ for a year. In under three hours, we achieved the climate-cooling equivalent of planting 267,954 mature trees. 🧵1/2

207,642 views • 1 year ago

Make Earth Cool Again. Yesterday, we had special guests 𝔊𝔴𝔢𝔯𝔫 and Alice help us deploy reflective clouds next to the Ozone layer to cool Earth. In total we launched four balloons and placed ~7.25 pounds of sulfur dioxide (SO₂) close to the Ozone layer, including one launch that reached a height of 101,358 feet. These deployments offset the warming effect of 3,290 metric tons of CO₂ for a year. We achieved the climate-cooling equivalent of planting 149,545 mature trees that last for a year.

Make Earth Cool Again. Yesterday, we had special guests 𝔊𝔴𝔢𝔯𝔫 and Alice help us deploy reflective clouds next to the Ozone layer to cool Earth. In total we launched four balloons and placed ~7.25 pounds of sulfur dioxide (SO₂) close to the Ozone layer, including one launch that reached a height of 101,358 feet. These deployments offset the warming effect of 3,290 metric tons of CO₂ for a year. We achieved the climate-cooling equivalent of planting 149,545 mature trees that last for a year.

143,157 views • 1 year ago

We delivered 4,125 ton-years of cooling today with three balloons which is the equivalent of planting 196,428 trees that last for a year.

We delivered 4,125 ton-years of cooling today with three balloons which is the equivalent of planting 196,428 trees that last for a year.

154,418 views • 2 years ago

Last balloon of the day. This had our largest payload of the day with 4.32 pounds of sulfur dioxide in the biodegradable natural latex balloon. Thanks to all our customers who helped us cool Earth. Here's how you can directly help: 2/2

Last balloon of the day. This had our largest payload of the day with 4.32 pounds of sulfur dioxide in the biodegradable natural latex balloon. Thanks to all our customers who helped us cool Earth. Here's how you can directly help: 2/2

22,375 views • 1 year ago

Yesterday, we deployed three balloons with a total payload of 6,075 grams of sulfur dioxide (SO2) into the stratosphere, decoupling the warming of 6,075 tons of CO2 for a year. 🌍 🌳That’s like planting 289,285 trees that last for a year! 🌳 Bonus: We made history with the first-ever balloon launch carrying the largest SO2 payload into the stratosphere—3,095 grams in a single 4kg balloon! Special thanks to nvo and Tom Eliot for documenting the launch and helping us cool Earth.

Yesterday, we deployed three balloons with a total payload of 6,075 grams of sulfur dioxide (SO2) into the stratosphere, decoupling the warming of 6,075 tons of CO2 for a year. 🌍 🌳That’s like planting 289,285 trees that last for a year! 🌳 Bonus: We made history with the first-ever balloon launch carrying the largest SO2 payload into the stratosphere—3,095 grams in a single 4kg balloon! Special thanks to nvo and Tom Eliot for documenting the launch and helping us cool Earth.

29,639 views • 1 year ago

On Earth Day 2025, we deployed four natural latex biodegradable weather balloons with a total payload of 7,200 grams (~15.8 pounds) of sulfur dioxide into the stratosphere. These 4🎈 offset the warming effect of 7,200 metric tons of CO2 for a year. Or another way to put it, we offset the warming effect of 1,565 gas-powered cars for a year. Thanks to all our customers who helped us make Earth a little cooler.

On Earth Day 2025, we deployed four natural latex biodegradable weather balloons with a total payload of 7,200 grams (~15.8 pounds) of sulfur dioxide into the stratosphere. These 4🎈 offset the warming effect of 7,200 metric tons of CO2 for a year. Or another way to put it, we offset the warming effect of 1,565 gas-powered cars for a year. Thanks to all our customers who helped us make Earth a little cooler.

10,696 views • 1 year ago

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