Carbon-dioxide removal could be a trillion-dollar enterprise because it not only slows the rise in CO₂ but reverses it.

Many companies are vying to prove that carbon removal is feasible, but also owe their origins to the ideas of a physicist and sustainability scientist named Klaus Lackner, who now works at Arizona State University.

Featured in The New Yorker, this article chronicles the journey that led Klaus to found the Center for Negative Carbon Emissions.