CO2e
n.β Β«The IPCC has crunched the numbers and says this means a tax of about $50 levied on every metric ton of GHGs, or carbon dioxide equivalent (CO2e to use their terminology).Β» ββWe Need a Global Carbon Tax” by Ralph Nader, Toby Heaps Wall Street Journal Dec. 2, 2008. (source: Double-Tongued Dictionary)