Apparently, CO2 is Green is, what's the word I'm looking for here, stupid, perhaps, but a little too personal, wrong, there that's the one.

Our results show an unexpected widespread tree growth decline in temperate and boreal forests due to warming induced stress but are also suggestive of additional stressors. Rising atmospheric CO2 levels during the past century resulted in consistent increases in water use efficiency, but this did not prevent growth decline. These findings challenge current predictions of increasing terrestrial carbon stocks under climate change scenarios.

via theenergycollective.com