Carbon dioxide equivalent
Carbon dioxide equivalent (CO2-e) is a measure used to convert the masses of each of the greenhouse gases to a mass of CO2 that would give the equivalent global warming potential generally over a 100 year timeframe. Carbon dioxide equivalency thus reflects the time-integrated radiative forcing of a quantity of emissions or rate of greenhouse gas emission. For example, methane has a CO2-e 25 times that of CO2, and nitrous oxide 298 times.
Carbon dioxide intensity and carbon dioxide per capita Alternatives to total emissions for measuring a nation?s greenhouse gas emissions. Carbon intensity measures emissions per unit of gross domestic product. Carbon dioxide per capita measures emissions per person. Both measures can be used to look at emission differences between nations. For example, while China has recently taken the lead in total greenhouse gas emissions, its per capita emissions level is far lower than that in most industrial countries.