Whereas widespread agreement on a gold standard remains elusive, the present study shows that the principal GHG emissions calculation methods produce consistent rankings within specific route - structure classes. (mpra.ub.uni-muenchen.de)
We do not currently include emissions calculations related to categories such as public transit, diet, pet ownership, or recycling. (cotap.org)
They believe this expansion could further improve overall emissions calculations. (insteading.com)