Excessive levels of greenhouse gases, specifically carbon dioxide, or CO2, is a growing threat to Earth’s climate and inhabitants. Experts say any feasible solution requires extensive ventures by the world’s major governments. Success hinges on development and deployment of advanced technology designed to combat the growing crisis. One of the emerging CO2 removal tools is the “mechanical tree” developed at ASU’s Center for Negative Carbon Emissions, led by “the intellectual godfather of carbon removal,” Fulton Schools Professor Klaus Lackner. He says the big question isn’t whether the technology will work, but how much governments around the world are willing to invest in it. The article looks at endeavors to push forward with atmospheric greenhouse gas removal endeavors and the challenges those efforts face.