“A Seattle startup aims to remove millions of tons of carbon dioxide from the atmosphere with a process that avoids the astronomical energy demands of other carbon capture approaches. The technology? Sunlight and seawater.

The company, Banyu Carbon, says it has developed an ocean carbon dioxide removal (CDR) system that relies on a synthetic molecule that, when exposed to light, changes shape and becomes acidic. When it interacts with seawater, the resulting process scrubs CO2. Though the company is currently working at the gram scale, its technology holds the promise of a low-cost way to limit global warming.”

From Bloomberg.