We kick off the new year with a look back at the 2014 Fall meeting of the American Geophysical Union, featuring some 25,000 scientists and at least a handful of not-so-scientists. In episode 27, “Geoengineering and the AGU” we tackle such difficult questions as “which is worse: imagined pollution to prevent the damage from actual pollution, or actual pollution?”. If this question seems senseless to you, then you’ll want to tune in and hear our take on random encounters at the AGU, live sound bites from the meeting, and a peak ahead at exciting spacecraft encounters for 2015. Download episode 27 and all our past episodes on iTunes or at our media blog.