A collection of 'branch' carbon dioxide collectors, or scrubbers, bunched together and displayed in a small box, designed by Professor Klaus Lackner whilst working for research company Global Research Technologies run by Allen Wright, Tucson, Arizona, USA, c.2008. This item was an expermental prototype technology for direct air capture (DAC), or the removal of carbon dioxide from the air at normal atmospheric concentrations. Prototype carbon dioxide collectors designed by Professor Klaus Lackner and Allen Wright 2008