Andrew Song and Luke Iseman of Make Sunsets ready for a launch. Iseman says they hope to someday cool the earth on a larger scale. Julia Simon/NPR
Julia Simon/NPR
SAN JOSE, Calif. — One morning late last year, an RV pulled into a parking lot on the outskirts of Silicon Valley. Inside it was a blue Ikea bag with huge balloons, and metal tanks full of helium and sulfur dioxide gas.
The mission was led by Luke Iseman, a 41-year-old serial entrepreneur with a mohawk hairstyle and an orange t-shirt
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