The Earth is getting significantly greener because there’s more carbon dioxide in the air.
From a quarter to half of Earth’s vegetated lands has shown significant greening over the last 35 years largely due to rising levels of atmospheric carbon dioxide.
The greening represents an increase in leaves on plants and trees equivalent in area to two times the continental United States.
Of course, we can’t have a parade without someone wanting to rain on it:
While rising carbon dioxide concentrations in the air can be beneficial for plants, it is also the chief culprit of climate change.
This greening was probably not accounted for in the GCMs (Global Circulation Models, i.e., climate models). At least, I’ve never seen mention of this in model descriptions. While these models include feedback mechanisms that magnify* the effects of more CO2 in the atmosphere, greening mitigates the effect by fixing atmospheric carbon in biomass. Patrick Moore has been saying this for ages. Maybe people will listen now that the evidence is overwhelming. This effect can go some way in explaining why the GCMs have systematically over-predicted the rise in temperature. Doomsday averted again!
*If the effect of added CO2 were not enhanced by a positive feedback effect, much less warming would be predicted. The principal greenhouse gas has always been water vapor. Warmer temperatures put more water into the air, thereby magnifying the effect of added CO2 – allegedly. The flies in the ointment are that more water also makes more clouds and more CO2 makes more plants.