A plant in Iceland recently became the first large-scale facility to remove carbon dioxide from the air on behalf of corporate clients paying to reduce their carbon footprints. The Climeworks operation uses a process called direct-air capture, or DAC. Marketplace’s Meghan McCarty Carino spoke with Aniruddh Mohan, a postdoctoral fellow at the Andlinger Center for Energy and the Environment at Princeton University. He said the technology could be key to averting the worst of climate change.