Recommendation #19 on carbon neutrality could be fleshed out. For example, the May 2007 issue of "Backpacker" magazine (p. 37) provides two sites (nativeenergy.com and terrapass.com) that have carbon calculators to estimate single-trip footprints. A round-trip flight between Philadelphia and Salt Lake City, for example, costs $15. How would the APSA staff implement such a voluntary option? One possibility would be a surcharge to our convention registration fee, based on distance and mode of transit. Would this then be passed on to our institutions as a part of our travel expenses?