How is air-capture functionally different from stationary capture?
Stationary capture technologies aim to capture CO2 as it is being produced at the site of combustion. Air-capture is different in that it collects the CO2 that is already in the air. Typically, the air-capture unit will be at a different location from the source of CO2 emissions. Air-capture can reduce CO2 concentrations from any source, including emissions from point sources, from dispersed human sources such as automobiles and airplanes, and from natural sources like forest fires and volcanoes. Unlike stationary capture, air-capture can address past emissions which are a growing component of current carbon dioxide concentrations. Air-capture is the only technology currently available to reduce past emissions.
