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