Chris, those figures have got to be estimates. And the planet has been greening more as CO2 levels have risen. One of the arguments from alarmists that I keep seeing is that the CO2 from fossil fuels is responsible for all the increase in CO2 which is clearly not the case. They claim it is not reabsorped in photosynthesis & by cooler regions of the ocean. This is clearly nonsense.
Plimer has suggested that FF estimates of emissions may be too high.