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>Make Sunsets
The mission was led by Luke Iseman, a 41-year-old serial entrepreneur with a mohawk hairstyle and an orange t-shirt that read "Cool Earth." Inspired by a science fiction novel, Iseman had founded a company in 2022 called Make Sunsets. In the novel, a billionaire undertakes a type of "solar geoengineering": shooting vast amounts of reflective particles high into the atmosphere to reflect sunlight off Earth and counter global warming. Now, Iseman was trying to do it in the real world.
The three balloons that Make Sunsets launched that day made it to the stratosphere – a layer of the atmosphere about six to 30 miles above Earth's surface. When the balloons popped, the sulfur dioxide gas turned to particles– reflecting enough sunlight, the company says, to offset the warming of 175 gas-powered cars for a year. But Make Sunsets and its balloons signal something bigger: a growing number of startups, research projects, and billionaire-backed nonprofits hoping to ready this tech to potentially cool the earth on a wider scale.
But Make Sunsets is attracting significant Silicon Valley investment, and is hoping to have that bigger impact. The company has raised more than $1.2 million from venture capital firms like Boost VC, Pioneer Fund, and Draper Associates.
https://www.npr.org/2024/04/21/1244357506/earth-day-solar-geoengineering-climate-make-sunsets-stardust