This New Company Lets You "Save the Planet" for $9.95

Some efforts are so disproportionate to their impact that they border on the absurd—like bailing out the ocean with a teaspoon. In this episode of Created to Reign, David R. Legates takes aim at one such effort: a Silicon Valley–style geoengineering startup selling “cooling credits” by launching weather balloons filled with sulfur dioxide into the stratosphere. On paper, the idea borrows from real science—volcanic eruptions do cool the planet, after all. But when you scale the math, the...