GHG	Emissions 2009 (million tonnes)	Emissions 1990 (million tonnes)	Emissions 1950 (million tonnes)	Emissions 1950 (annotation)
CO2	1.76	1.288732214	0.594955859	A new dimension
CH4	0.502	0.470354525	0.235243101
N2O	0.172	0.129200535	0.064408219
PFC,HFC,SF6	0.015	0.0111088	0	Energy
Montreal gasses	0.26	0.229976021	0