This study builds on the earlier versions of the global GHG abatement database from 2007. The abatement database is comprised of an in-depth evaluation of the potential, and the costs, of more than 200 greenhouse gas abatement opportunities across 10 sectors and 21 world regions, and in a 2030 time perspective. The analysis finds that there is potential by 2030 to reduce GHG emissions by 35% compared with 1990 levels, or by 70% compared with levels we would see in 2030 if no change was made.