Fast-growing trees like these willows pull carbon dioxide from the atmosphere while adding oxygen. / Photo by Ned Rozell

A green system of carbon-dioxide removal

Last week, I wrote about a thought experiment proposed by Fairbanks scientist Jim Beget. He suggests raining down crystals of a compound that captures carbon dioxide onto a frigid plateau in Antarctica. There, the greenhouse gas might remain locked for a few hundred thousand years. Beget will present his idea at the fall meeting of […]