With the rate at which carbon dioxide is being emitted into the atmosphere, it will take much more than gradually reducing those emissions to keep the greenhouse gas from reaching more threatening levels. Among the more promising solutions to the problem is technology coming out of ASU’s Center for Negative Carbon Emissions, directed by Fulton Schools Professor Klaus Lackner. His lab’s “artificial trees” (one of them is pictured here) are able to capture carbon dioxide and remove it from the air. An investment group is financing deployment of clusters of the devices at carbon-capture “farms” in various locations.