In Silicon Valley, a Rogue Plan to Alter the Climate

"Make Sunsets is one of the most unusual start-ups in a region brimming with wild ideas. Iseman, 41, and his co-founder, Andrew Song, 38, claim that by releasing sulfur dioxide into the stratosphere, they can reflect some of the sun's energy back into space, thereby cooling the planet. It's a gutsy undertaking, yet it has at least a partial grounding in science."

"For 50 years, climate scientists have suggested that releasing aerosols into the stratosphere could act as a buffer and reduce the heat from the sun. Volcanic eruptions have temporarily cooled the planet this way in the past, but no one has attempted to intentionally replicate the effect at scale."

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