http://blogs.ei.columbia.edu Wed, 19 Jun 2013 17:31:36 +0000 en-US hourly 1 http://wordpress.org/?v=3.5.1 http://blogs.ei.columbia.edu/2011/10/18/artificial-trees-giving-us-the-time-to-act/ http://blogs.ei.columbia.edu/2011/10/18/artificial-trees-giving-us-the-time-to-act/#comments Tue, 18 Oct 2011 15:23:20 +0000 Guest Blogger http://blogs.ei.columbia.edu/?p=19079 Soon after Klaus Lackner met Allen Wright at Biosphere 2 in Arizona, they began dreaming up a way to pull CO2 out of the air. After years of work, the two have come up with a working laboratory-scale prototype...]]> http://blogs.ei.columbia.edu/2011/10/18/artificial-trees-giving-us-the-time-to-act/feed/ 0